# Al–Fe phases

> Al–Fe system: 13 phases (tier A 5, tier C 3, liquid 1, needs_review 4); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

HTML: https://data.orchid-project.org/phases/pages/AL-FE.html · Markdown: https://data.orchid-project.org/phases/pages/AL-FE.md

13 phases (tier A 5, tier C 3, liquid 1, needs_review 4); 11 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: [interactive registry](https://orchid-project.org/phases/?q=AL-FE) · [full JSON](https://data.orchid-project.org/phases/systems/AL-FE.json) · [Al–Fe system page](https://data.orchid-project.org/systems/AL-FE.html) · [Markdown](https://data.orchid-project.org/phases/pages/AL-FE.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Al–Fe system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [A2_4SL](#phase-al-fe-a2-4sl); _phase:al-fe:a2-4sl_ |  | needs_review | not stable in 3 calculated diagram(s) | 0 | 3 |
| [AL13FE4](#phase-al-fe-al13fe4); _phase:al-fe:al13fe4_ |  | needs_review | stable in 11 of 11 calculated diagram(s): 300–1428.53 K, x(Fe) 0.23435–0.26518 | 49 | 11 |
| [AL2FE](#phase-al-fe-al2fe); _phase:al-fe:al2fe_ | Al2Fe · aP18 · P1 (1) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 11 of 11 calculated diagram(s): 300–1430.68 K, x(Fe) 0.32943–0.36234 | 68 | 11 |
| [AL5FE2](#phase-al-fe-al5fe2); _phase:al-fe:al5fe2_ | Al5Fe2 · oC24 · Cmcm (63) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 11 of 11 calculated diagram(s): 300–1434.57 K, x(Fe) 0.27179–0.31257 | 106 | 11 |
| [AL5FE4](#phase-al-fe-al5fe4); _phase:al-fe:al5fe4_ | Cu5Zn8 · D8_2 · cI52 · I-43m (217) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 1357.33–1501.79 K, x(Fe) 0.36411–0.43508 | 6 | 4 |
| [AL8FE5_D82](#phase-al-fe-al8fe5-d82); _phase:al-fe:al8fe5-d82_ | Cu5Zn8 · D8_2 · cI52 · I-43m (217) | tier A: standard phase name | stable in 7 of 7 calculated diagram(s): 1367.89–2500 K, x(Fe) 0.15389–0.44414 | 126 | 7 |
| [BCC_4SL](#phase-al-fe-bcc-4sl); _phase:al-fe:bcc-4sl_ |  | needs_review | stable in 4 of 4 calculated diagram(s): 300–1810 K, x(Fe) 0.47196–1 | 0 | 4 |
| [BCC_A2](#phase-al-fe-bcc-a2); _phase:al-fe:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 11 of 11 calculated diagram(s): 300–1820 K, x(Fe) 0.44948–1 | 0 | 21 |
| [B2_BCC](#phase-al-fe-bcc-b2); _phase:al-fe:bcc-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 10 of 10 calculated diagram(s): 300–1825.37 K, x(Fe) 0.45451–1 | 59 | 10 |
| [FCC_4SL](#phase-al-fe-fcc-4sl); _phase:al-fe:fcc-4sl_ |  | needs_review | stable in 4 of 4 calculated diagram(s): 300–1679.81 K, x(Fe) 0–1 | 0 | 4 |
| [FCC_A1](#phase-al-fe-fcc-a1); _phase:al-fe:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 11 of 11 calculated diagram(s): 300–1674.47 K, x(Fe) 0–1 | 15 | 15 |
| [HCP_A3](#phase-al-fe-hcp-a3); _phase:al-fe:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 10 calculated diagram(s) | 0 | 10 |
| [LIQUID](#phase-al-fe-liquid); _phase:al-fe:liquid_ | liquid | liquid | stable in 11 of 11 calculated diagram(s): 922.63–2500 K, x(Fe) 0–1 | 117 | 11 |

## A2_4SL (Al–Fe)

- Id: `phase:al-fe:a2-4sl`; status `needs_review`
- No structure assigned. Why: unrecognised_name_tokens:4SL
- Candidate (name_token): W · A2 · cI2 · Im-3m (229) — Strukturbericht/word 'A2' in the TDB name
- Stability: not stable in 3 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:a2-4sl)

Names (4): _corpus: _corpus:phase:al-fe:a2-4sl  
_tdb: _tdb:AlFe-09Sun-no-option-F.tdb:A2_4SL, tdb:AlFe-09Sun.tdb:A2_4SL, tdb:AlFe-21Mur.tdb:A2_4SL  


### TDB models of A2_4SL (3): PHASE and CONSTITUENT statements as written

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): A2_4SL, type code %B, sha256 `884d6fe9e57d8ed3…`

~~~~text
70: PHASE A2_4SL %B 2 1 3 !
71: CONST A2_4SL : AL FE : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): A2_4SL, type code %B, sha256 `5d81bdcb3a4d8f17…`

~~~~text
74: PHASE A2_4SL %B 2 1 3 !
75: CONST A2_4SL : AL FE : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): A2_4SL, type code %B, sha256 `01ab7de1d7d061d4…`

~~~~text
61: PHASE A2_4SL %B 2 1 3 !
62: CONST A2_4SL : AL FE : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_

## AL13FE4 (Al–Fe)

- Id: `phase:al-fe:al13fe4`; status `needs_review`
- No structure assigned. Why: assessment_declared_compound_differs_from_model_composition; no_structure_token; off_stoichiometric_model
- Candidate (dft_mp): C2/m (12) — on-hull MP Al13Fe4 at x(FE)=0.2353
- Candidate (dft_oqmd): C2/m (12) — on-hull OQMD Al13 Fe4 at x(FE)=0.2353
- Candidate (literature_printed): Al13Fe4 · mC102 — printed with a label mapped to this phase
- Candidate (sgte_mmc2): Al13Fe4 · mC102 · C2/m (12) — Hallstedt 2025 mmc2 row for AL13FE4: Al13Fe4
- Candidate (tdb_comment):  — AlFe-07Zha.tdb: 'Prototype Al13Fe4 (mC102 C2/m)'
- Candidate (tdb_comment):  — AlFe-09Jac.tdb: 'Prototype Al13Fe4 (mC102 C2/m)'
- Candidate (tdb_comment): Al13Fe4 · mC102 · C2/m — AlFe-09Sun-no-option-F.tdb: 'Prototype Al13Fe4 (mC102, C2/m)'
- Candidate (tdb_comment): Al13Fe4 · mC102 · C2/m — AlFe-09Sun.tdb: 'Prototype Al13Fe4 (mC102, C2/m)'
- Stability: stable in 11 of 11 calculated diagram(s): 300–1428.53 K, x(Fe) 0.23435–0.26518
- Literature: 49 values (48 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:al13fe4)

Names (17): _corpus: _corpus:phase:al-fe:al13fe4  
_paper: _paper:10.1016/j.calphad.2008.07.010:FeAl3, paper:10.1016/j.jallcom.2018.01.316:θ, paper:10.1016/j.jallcom.2022.168361:θ, paper:10.1016/j.jallcom.2022.168361:θ-Al13Fe4, paper:sha256-85fd53a1a176b694:Al13Fe4  
_tdb: _tdb:AlFe-07Zha.tdb:AL13FE4, tdb:AlFe-09Jac.tdb:AL13FE4, tdb:AlFe-09Sun-no-option-F.tdb:AL13FE4, tdb:AlFe-09Sun.tdb:AL13FE4, tdb:AlFe-15Mie.tdb:AL13FE4, tdb:AlFe-17Zhe.tdb:AL13FE4, tdb:AlFe-18Zie.tdb:AL13FE4, tdb:AlFe-19Ran.tdb:AL13FE4, tdb:AlFe-21Mur.tdb:AL13FE4, tdb:AlFe-23Ila.tdb:AL13FE4, tdb:AlFe-93Sei-LB.tdb:AL13FE4  


### TDB models of AL13FE4 (11): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): AL13FE4, type code %, sha256 `64a98b3da69234a7…`

~~~~text
58: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
59: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): AL13FE4, type code %, sha256 `3a7e20dfdebcf711…`

~~~~text
52: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
53: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): AL13FE4, type code %, sha256 `884d6fe9e57d8ed3…`

~~~~text
81: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
82: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): AL13FE4, type code %, sha256 `5d81bdcb3a4d8f17…`

~~~~text
90: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
91: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): AL13FE4, type code %, sha256 `b767413d93e5b710…`

~~~~text
44: PHASE AL13FE4 % 2 0.752 0.248 !
45: CONST AL13FE4 : AL : FE : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): AL13FE4, type code %, sha256 `ebe1dc119ebdbd61…`

~~~~text
78: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
79: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): AL13FE4, type code %, sha256 `7be8d8a9158e1e62…`

~~~~text
58: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
59: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): AL13FE4, type code %, sha256 `7b14112fd3ae4d9c…`

~~~~text
57: PHASE AL13FE4 % 2 13 4 !
58: CONST AL13FE4 : AL% FE : AL FE% : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): AL13FE4, type code %, sha256 `01ab7de1d7d061d4…`

~~~~text
77: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
78: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): AL13FE4, type code %, sha256 `2210cc1e5240d750…`

~~~~text
63: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
64: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): AL13FE4, type code %, sha256 `565fb0ca7ceedee4…`

~~~~text
51: PHASE AL13FE4 % 3 0.6275 0.235 0.1375 !
52: CONST AL13FE4 : AL : FE : AL VA : !
~~~~

Example references (10 of 14; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_

## AL2FE (Al–Fe)

- Id: `phase:al-fe:al2fe`; status `assigned`
- Structure: Al2Fe · aP18 · P1 (1); type `st:al2fe-ap18`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 11 of 11 calculated diagram(s): 300–1430.68 K, x(Fe) 0.32943–0.36234
- Literature: 68 values (66 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:al2fe)

Names (17): _corpus: _corpus:phase:al-fe:al2fe  
_paper: _paper:10.1016/j.calphad.2008.07.010:FeAl2, paper:10.1016/j.jallcom.2018.01.316:ζ, paper:10.1016/j.jallcom.2022.168361:ζ, paper:10.1016/j.jallcom.2022.168361:ζ-Al2Fe, paper:sha256-85fd53a1a176b694:Al2Fe  
_tdb: _tdb:AlFe-07Zha.tdb:AL2FE, tdb:AlFe-09Jac.tdb:AL2FE, tdb:AlFe-09Sun-no-option-F.tdb:AL2FE, tdb:AlFe-09Sun.tdb:AL2FE, tdb:AlFe-15Mie.tdb:AL2FE, tdb:AlFe-17Zhe.tdb:AL2FE, tdb:AlFe-18Zie.tdb:AL2FE, tdb:AlFe-19Ran.tdb:AL2FE, tdb:AlFe-21Mur.tdb:AL2FE, tdb:AlFe-23Ila.tdb:AL2FE, tdb:AlFe-93Sei-LB.tdb:AL2FE  


### TDB models of AL2FE (11): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): AL2FE, type code %, sha256 `64a98b3da69234a7…`

~~~~text
69: PHASE AL2FE % 2 2 1 !
70: CONST AL2FE : AL : FE : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): AL2FE, type code %, sha256 `3a7e20dfdebcf711…`

~~~~text
63: PHASE AL2FE % 2 2 1 !
64: CONST AL2FE : AL : FE : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): AL2FE, type code %, sha256 `884d6fe9e57d8ed3…`

~~~~text
92: PHASE AL2FE % 2 2 1 !
93: CONST AL2FE : AL : FE : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): AL2FE, type code %, sha256 `5d81bdcb3a4d8f17…`

~~~~text
101: PHASE AL2FE % 2 2 1 !
102: CONST AL2FE : AL : FE : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): AL2FE, type code %, sha256 `b767413d93e5b710…`

~~~~text
55: PHASE AL2FE % 2 2 1 !
56: CONST AL2FE : AL : FE : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): AL2FE, type code %, sha256 `ebe1dc119ebdbd61…`

~~~~text
89: PHASE AL2FE % 2 2 1 !
90: CONST AL2FE : AL : FE : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): AL2FE, type code %, sha256 `7be8d8a9158e1e62…`

~~~~text
69: PHASE AL2FE % 3 12 5 2 !
70: CONST AL2FE : AL : FE : AL FE : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): AL2FE, type code %, sha256 `7b14112fd3ae4d9c…`

~~~~text
68: PHASE AL2FE % 2 2 1 !
69: CONST AL2FE : AL% FE : AL FE% : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): AL2FE, type code %, sha256 `01ab7de1d7d061d4…`

~~~~text
88: PHASE AL2FE % 2 2 1 !
89: CONST AL2FE : AL : FE : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): AL2FE, type code %, sha256 `2210cc1e5240d750…`

~~~~text
74: PHASE AL2FE % 3 12 5 2 !
75: CONST AL2FE : AL : FE : AL FE : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): AL2FE, type code %, sha256 `565fb0ca7ceedee4…`

~~~~text
62: PHASE AL2FE % 2 2 1 !
63: CONST AL2FE : AL : FE : !
~~~~

Example references (10 of 14; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_

## AL5FE2 (Al–Fe)

- Id: `phase:al-fe:al5fe2`; status `assigned`
- Structure: Al5Fe2 · oC24 · Cmcm (63); type `st:al5fe2-oc24`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 11 of 11 calculated diagram(s): 300–1434.57 K, x(Fe) 0.27179–0.31257
- Literature: 106 values (103 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:al5fe2)

Names (17): _corpus: _corpus:phase:al-fe:al5fe2  
_paper: _paper:10.1016/j.calphad.2008.07.010:Fe2Al5, paper:10.1016/j.jallcom.2018.01.316:η, paper:10.1016/j.jallcom.2022.168361:η, paper:10.1016/j.jallcom.2022.168361:η-Al5Fe2, paper:sha256-85fd53a1a176b694:Al5Fe2  
_tdb: _tdb:AlFe-07Zha.tdb:AL5FE2, tdb:AlFe-09Jac.tdb:AL5FE2, tdb:AlFe-09Sun-no-option-F.tdb:AL5FE2, tdb:AlFe-09Sun.tdb:AL5FE2, tdb:AlFe-15Mie.tdb:AL5FE2, tdb:AlFe-17Zhe.tdb:AL5FE2, tdb:AlFe-18Zie.tdb:AL5FE2, tdb:AlFe-19Ran.tdb:AL5FE2, tdb:AlFe-21Mur.tdb:AL5FE2, tdb:AlFe-23Ila.tdb:AL5FE2, tdb:AlFe-93Sei-LB.tdb:AL5FE2  


### TDB models of AL5FE2 (11): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): AL5FE2, type code %, sha256 `64a98b3da69234a7…`

~~~~text
64: PHASE AL5FE2 % 2 5 2 !
65: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): AL5FE2, type code %, sha256 `3a7e20dfdebcf711…`

~~~~text
58: PHASE AL5FE2 % 2 5 2 !
59: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): AL5FE2, type code %, sha256 `884d6fe9e57d8ed3…`

~~~~text
87: PHASE AL5FE2 % 2 5 2 !
88: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): AL5FE2, type code %, sha256 `5d81bdcb3a4d8f17…`

~~~~text
96: PHASE AL5FE2 % 2 5 2 !
97: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): AL5FE2, type code %, sha256 `b767413d93e5b710…`

~~~~text
50: PHASE AL5FE2 % 2 5 2 !
51: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): AL5FE2, type code %, sha256 `ebe1dc119ebdbd61…`

~~~~text
84: PHASE AL5FE2 % 2 5 2 !
85: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): AL5FE2, type code %, sha256 `7be8d8a9158e1e62…`

~~~~text
64: PHASE AL5FE2 % 3 8 4 4 !
65: CONST AL5FE2 : AL : FE : AL VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): AL5FE2, type code %, sha256 `7b14112fd3ae4d9c…`

~~~~text
63: PHASE AL5FE2 % 2 5 2 !
64: CONST AL5FE2 : AL% FE : AL FE% : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): AL5FE2, type code %, sha256 `01ab7de1d7d061d4…`

~~~~text
83: PHASE AL5FE2 % 2 5 2 !
84: CONST AL5FE2 : AL : FE : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): AL5FE2, type code %, sha256 `2210cc1e5240d750…`

~~~~text
69: PHASE AL5FE2 % 3 8 4 3 !
70: CONST AL5FE2 : AL : FE : AL FE : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): AL5FE2, type code %, sha256 `565fb0ca7ceedee4…`

~~~~text
57: PHASE AL5FE2 % 2 5 2 !
58: CONST AL5FE2 : AL : FE : !
~~~~

Example references (10 of 14; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.3139/146.101512](https://doi.org/10.3139/146.101512) Frank Stein, Martin Palm, Re-determination of transition temperatures in the Fe–Al system by differential thermal analysis, International Journal of Materials Research 98, 580-588 (2007).  
_cited as the source of values for this phase_

## AL5FE4 (Al–Fe)

- Id: `phase:al-fe:al5fe4`; status `assigned`
- Structure: Cu5Zn8 · D8_2 · cI52 · I-43m (217); type `st:d8-2-cu5zn8-ci52`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 4 of 4 calculated diagram(s): 1357.33–1501.79 K, x(Fe) 0.36411–0.43508
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:al5fe4)

Names (7): _corpus: _corpus:phase:al-fe:al5fe4  
_paper: _paper:10.1016/j.calphad.2008.07.010:ε  
_system_alias: _system_alias:al-fe:epsilon  
_tdb: _tdb:AlFe-07Zha.tdb:AL5FE4, tdb:AlFe-09Jac.tdb:AL5FE4, tdb:AlFe-15Mie.tdb:AL5FE4, tdb:AlFe-93Sei-LB.tdb:AL5FE4  


### TDB models of AL5FE4 (4): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): AL5FE4, type code %, sha256 `64a98b3da69234a7…`

~~~~text
75: PHASE AL5FE4 % 1 1 !
76: CONST AL5FE4 : AL FE : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): AL5FE4, type code %, sha256 `3a7e20dfdebcf711…`

~~~~text
69: PHASE AL5FE4 % 1 1 !
70: CONST AL5FE4 : AL FE : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): AL5FE4, type code %, sha256 `b767413d93e5b710…`

~~~~text
61: PHASE AL5FE4 % 1 1 !
62: CONST AL5FE4 : AL FE : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): AL5FE4, type code %, sha256 `565fb0ca7ceedee4…`

~~~~text
68: PHASE AL5FE4 % 1 1 !
69: CONST AL5FE4 : AL FE : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_

## AL8FE5_D82 (Al–Fe)

- Id: `phase:al-fe:al8fe5-d82`; status `assigned`
- Structure: Cu5Zn8 · D8_2 · cI52 · I-43m (217); type `st:d8-2-cu5zn8-ci52`; tier A: standard phase name; confidence high
- Caveat: partitioned order/disorder model in AlFe-09Sun-no-option-F.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-09Sun.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-17Zhe.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-19Ran.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-21Mur.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-23Ila.tdb also describes the disordered state
- Stability: stable in 7 of 7 calculated diagram(s): 1367.89–2500 K, x(Fe) 0.15389–0.44414
- Literature: 126 values (122 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:al8fe5-d82)

Names (13): _corpus: _corpus:phase:al-fe:al8fe5-d82  
_paper: _paper:10.1016/j.calphad.2008.07.010:ε, paper:10.1016/j.jallcom.2018.01.316:ε, paper:10.1016/j.jallcom.2022.168361:ε, paper:sha256-85fd53a1a176b694:Al5Fe4  
_system_alias: _system_alias:al-fe:epsilon  
_tdb: _tdb:AlFe-09Sun-no-option-F.tdb:AL8FE5_D82, tdb:AlFe-09Sun.tdb:AL8FE5_D82, tdb:AlFe-17Zhe.tdb:AL8FE5_D82, tdb:AlFe-18Zie.tdb:AL8FE5_D82, tdb:AlFe-19Ran.tdb:AL8FE5_D82, tdb:AlFe-21Mur.tdb:AL8FE5_D82, tdb:AlFe-23Ila.tdb:AL8FE5_D82  


### TDB models of AL8FE5_D82 (7): PHASE and CONSTITUENT statements as written

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): AL8FE5_D82, type code %, sha256 `884d6fe9e57d8ed3…`

~~~~text
97: PHASE AL8FE5_D82 % 2 8 5 !
98: CONST AL8FE5_D82 : AL FE : AL FE : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): AL8FE5_D82, type code %, sha256 `5d81bdcb3a4d8f17…`

~~~~text
106: PHASE AL8FE5_D82 % 2 8 5 !
107: CONST AL8FE5_D82 : AL FE : AL FE : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): AL8FE5_D82, type code %, sha256 `ebe1dc119ebdbd61…`

~~~~text
94: PHASE AL8FE5_D82 % 2 8 5 !
95: CONST AL8FE5_D82 : AL FE : AL FE : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): AL8FE5_D82, type code %, sha256 `7be8d8a9158e1e62…`

~~~~text
74: PHASE AL8FE5_D82 % 3 8 8 36 !
75: CONST AL8FE5_D82 : AL : FE : AL FE : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): AL8FE5_D82, type code %, sha256 `7b14112fd3ae4d9c…`

~~~~text
73: PHASE AL8FE5_D82 % 4 2 2 3 6 !
74: CONST AL8FE5_D82 : AL FE : FE : AL FE : AL : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): AL8FE5_D82, type code %, sha256 `01ab7de1d7d061d4…`

~~~~text
93: PHASE AL8FE5_D82 % 2 8 5 !
94: CONST AL8FE5_D82 : AL FE : AL FE : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): AL8FE5_D82, type code %, sha256 `2210cc1e5240d750…`

~~~~text
79: PHASE AL8FE5_D82 % 4 2 2 3 6 !
80: CONST AL8FE5_D82 : AL FE : FE : AL FE : AL : !
~~~~

Example references (10 of 11; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_reports values for this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_
- [doi:10.1016/j.jallcom.2016.01.215](https://doi.org/10.1016/j.jallcom.2016.01.215) K. Han, I. Ohnuma, R. Kainuma, Experimental determination of phase equilibria of Al-rich portion in the Al–Fe binary system, Journal of Alloys and Compounds 668, 97-106 (2016).  
_cited as the source of values for this phase_
- [doi:10.3139/146.101512](https://doi.org/10.3139/146.101512) Frank Stein, Martin Palm, Re-determination of transition temperatures in the Fe–Al system by differential thermal analysis, International Journal of Materials Research 98, 580-588 (2007).  
_cited as the source of values for this phase_

## BCC_4SL (Al–Fe)

- Id: `phase:al-fe:bcc-4sl`; status `needs_review`
- No structure assigned. Why: order_disorder_ambiguity:AlFe-09Sun-no-option-F.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-09Sun.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-17Zhe.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-21Mur.tdb_model_is_partitioned; sgte_mmc2_row_disagrees_with_name:BCC_4SL; sgte_mmc2_rows_disagree; unrecognised_name_tokens:4SL
- Candidate (dft_mp): Pm-3m (221) — on-hull MP AlFe at x(FE)=0.5000
- Candidate (dft_mp): Pm-3m (221) — on-hull MP AlFe3 at x(FE)=0.7500
- Candidate (dft_oqmd): Pm-3m (221) — on-hull OQMD Al1 Fe1 at x(FE)=0.5000
- Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Al1 Fe4 at x(FE)=0.8000
- Candidate (dft_oqmd): C2/m (12) — on-hull OQMD Al1 Fe5 at x(FE)=0.8333
- Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Al2 Fe5 at x(FE)=0.7143
- Candidate (name_token): W · A2 · cI2 · Im-3m (229) — Strukturbericht/word 'A2' in the TDB name
- Candidate (sgte_mmc2): CsCl · B2 · cP2 · Pm-3m (221) — Hallstedt 2025 mmc2 row for BCC_4SL: AlFe, AlMn, AlNi, NiTi
- Stability: stable in 4 of 4 calculated diagram(s): 300–1810 K, x(Fe) 0.47196–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:bcc-4sl)

Names (5): _corpus: _corpus:phase:al-fe:bcc-4sl  
_tdb: _tdb:AlFe-09Sun-no-option-F.tdb:BCC_4SL, tdb:AlFe-09Sun.tdb:BCC_4SL, tdb:AlFe-17Zhe.tdb:BCC_4SL, tdb:AlFe-21Mur.tdb:BCC_4SL  


### TDB models of BCC_4SL (4): PHASE and CONSTITUENT statements as written

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): BCC_4SL, type code %Z, sha256 `884d6fe9e57d8ed3…`

~~~~text
76: PHASE BCC_4SL %Z 5 0.25 0.25 0.25 0.25 3 !
77: CONST BCC_4SL : AL FE% : AL FE% : AL FE% : AL% FE : VA% :  !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): BCC_4SL, type code %Z, sha256 `5d81bdcb3a4d8f17…`

~~~~text
80: PHASE BCC_4SL:B %Z 5 0.25 0.25 0.25 0.25 3 !
81: CONST BCC_4SL:B : AL FE% : AL FE% : AL FE% : AL% FE : VA% :  !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): BCC_4SL, type code %BZ, sha256 `ebe1dc119ebdbd61…`

~~~~text
68: PHASE BCC_4SL:B %BZ 5 0.25 0.25 0.25 0.25 3 !
69: CONST BCC_4SL:B : AL FE% : AL FE% : AL FE% : AL% FE : VA% :  !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): BCC_4SL, type code %Z, sha256 `01ab7de1d7d061d4…`

~~~~text
67: PHASE BCC_4SL:B %Z 5 0.25 0.25 0.25 0.25 3 !
68: CONST BCC_4SL:B : AL FE% : AL FE% : AL FE% : AL% FE : VA% :  !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_

## BCC_A2 (Al–Fe)

- Id: `phase:al-fe:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stability: stable in 11 of 11 calculated diagram(s): 300–1820 K, x(Fe) 0.44948–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:bcc-a2)

Names (22): _corpus: _corpus:phase:al-fe:bcc-a2  
_tdb: _tdb:AlFe-07Zha.tdb:A2_BCC, tdb:AlFe-07Zha.tdb:BCC_A2, tdb:AlFe-09Jac.tdb:A2_BCC, tdb:AlFe-09Jac.tdb:BCC_A2, tdb:AlFe-09Sun-no-option-F.tdb:A2_BCC, tdb:AlFe-09Sun-no-option-F.tdb:BCC_A2, tdb:AlFe-09Sun.tdb:A2_BCC, tdb:AlFe-09Sun.tdb:BCC_A2, tdb:AlFe-15Mie.tdb:BCC_A2, tdb:AlFe-17Zhe.tdb:A2_BCC, tdb:AlFe-17Zhe.tdb:BCC_A2, tdb:AlFe-18Zie.tdb:A2_BCC, tdb:AlFe-18Zie.tdb:BCC_A2, tdb:AlFe-19Ran.tdb:A2_BCC, tdb:AlFe-19Ran.tdb:BCC_A2, tdb:AlFe-21Mur.tdb:A2_BCC, tdb:AlFe-21Mur.tdb:BCC_A2, tdb:AlFe-23Ila.tdb:A2_BCC, tdb:AlFe-23Ila.tdb:BCC_A2, tdb:AlFe-93Sei-LB.tdb:A2_BCC, tdb:AlFe-93Sei-LB.tdb:BCC_A2  


### TDB models of BCC_A2 (21): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): A2_BCC, type code %B, sha256 `64a98b3da69234a7…`

~~~~text
43: PHASE A2_BCC %B 2 1 3 !
44: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): BCC_A2, type code %B, sha256 `64a98b3da69234a7…`

~~~~text
38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): A2_BCC, type code %B, sha256 `3a7e20dfdebcf711…`

~~~~text
37: PHASE A2_BCC %B 2 1 3 !
38: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): BCC_A2, type code %B, sha256 `3a7e20dfdebcf711…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): A2_BCC, type code %B, sha256 `884d6fe9e57d8ed3…`

~~~~text
60: PHASE A2_BCC %B 2 1 3 !
61: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): BCC_A2, type code %B, sha256 `884d6fe9e57d8ed3…`

~~~~text
55: PHASE BCC_A2 %B 2 1 3 !
56: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): A2_BCC, type code %B, sha256 `5d81bdcb3a4d8f17…`

~~~~text
64: PHASE A2_BCC %B 2 1 3 !
65: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): BCC_A2, type code %B, sha256 `5d81bdcb3a4d8f17…`

~~~~text
59: PHASE BCC_A2 %B 2 1 3 !
60: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): BCC_A2, type code %B, sha256 `b767413d93e5b710…`

~~~~text
34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): A2_BCC, type code %B, sha256 `ebe1dc119ebdbd61…`

~~~~text
57: PHASE A2_BCC %B 2 1 3 !
58: CONST A2_BCC : AL FE : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): BCC_A2, type code %B, sha256 `ebe1dc119ebdbd61…`

~~~~text
52: PHASE BCC_A2 %B 2 1 3 !
53: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): A2_BCC, type code %B, sha256 `7be8d8a9158e1e62…`

~~~~text
43: PHASE A2_BCC %B 2 1 3 !
44: CONST A2_BCC : AL FE : VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): BCC_A2, type code %B, sha256 `7be8d8a9158e1e62…`

~~~~text
38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): A2_BCC, type code %B, sha256 `7b14112fd3ae4d9c…`

~~~~text
42: PHASE A2_BCC %B 2 1 3 !
43: CONST A2_BCC : AL FE : VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): BCC_A2, type code %B, sha256 `7b14112fd3ae4d9c…`

~~~~text
37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): A2_BCC, type code %B, sha256 `01ab7de1d7d061d4…`

~~~~text
51: PHASE A2_BCC %B 2 1 3 !
52: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): BCC_A2, type code %B, sha256 `01ab7de1d7d061d4…`

~~~~text
46: PHASE BCC_A2 %B 2 1 3 !
47: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): A2_BCC, type code %B, sha256 `2210cc1e5240d750…`

~~~~text
48: PHASE A2_BCC %B 2 1 3 !
49: CONST A2_BCC : AL FE : VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): BCC_A2, type code %B, sha256 `2210cc1e5240d750…`

~~~~text
43: PHASE BCC_A2 %B 2 1 3 !
44: CONST BCC_A2 : AL FE : VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): A2_BCC, type code %B, sha256 `565fb0ca7ceedee4…`

~~~~text
36: PHASE A2_BCC %B 2 1 3 !
37: CONST A2_BCC : AL FE VA : VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): BCC_A2, type code %B, sha256 `565fb0ca7ceedee4…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : AL FE : VA : !
~~~~

Example references (9 of 9; assessments first): 

- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase_

## B2_BCC (Al–Fe)

- Id: `phase:al-fe:bcc-b2`; status `assigned`
- Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high
- Caveat: AlFe-07Zha.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-09Jac.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-09Sun-no-option-F.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-09Sun.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-17Zhe.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-18Zie.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-19Ran.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-21Mur.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-23Ila.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: AlFe-93Sei-LB.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
- Caveat: partitioned order/disorder model in AlFe-07Zha.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-09Jac.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-09Sun-no-option-F.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-09Sun.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-17Zhe.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-18Zie.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-19Ran.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-21Mur.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-23Ila.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in AlFe-93Sei-LB.tdb also describes the disordered state
- Stability: stable in 10 of 10 calculated diagram(s): 300–1825.37 K, x(Fe) 0.45451–1
- Literature: 59 values (57 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:bcc-b2)

Names (17): _corpus: _corpus:phase:al-fe:bcc-b2, corpus:phase:al-fe:b2-bcc  
_paper: _paper:10.1016/j.calphad.2008.07.010:bcc_B2, paper:10.1016/j.jallcom.2018.01.316:B2, paper:10.1016/j.jallcom.2018.01.316:\[B2 + ζ\], paper:10.1016/j.jallcom.2022.168361:B2, paper:sha256-85fd53a1a176b694:bcc-B2  
_tdb: _tdb:AlFe-07Zha.tdb:B2_BCC, tdb:AlFe-09Jac.tdb:B2_BCC, tdb:AlFe-09Sun-no-option-F.tdb:B2_BCC, tdb:AlFe-09Sun.tdb:B2_BCC, tdb:AlFe-17Zhe.tdb:B2_BCC, tdb:AlFe-18Zie.tdb:B2_BCC, tdb:AlFe-19Ran.tdb:B2_BCC, tdb:AlFe-21Mur.tdb:B2_BCC, tdb:AlFe-23Ila.tdb:B2_BCC, tdb:AlFe-93Sei-LB.tdb:B2_BCC  


### TDB models of B2_BCC (10): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): B2_BCC, type code %BO, sha256 `64a98b3da69234a7…`

~~~~text
48: PHASE B2_BCC %BO 3 0.5 0.5 3 !
49: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): B2_BCC, type code %BO, sha256 `3a7e20dfdebcf711…`

~~~~text
42: PHASE B2_BCC %BO 3 0.5 0.5 3 !
43: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): B2_BCC, type code %BO, sha256 `884d6fe9e57d8ed3…`

~~~~text
65: PHASE B2_BCC %BO 3 0.5 0.5 3 !
66: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): B2_BCC, type code %BO, sha256 `5d81bdcb3a4d8f17…`

~~~~text
69: PHASE B2_BCC %BO 3 0.5 0.5 3 !
70: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): B2_BCC, type code %BO, sha256 `ebe1dc119ebdbd61…`

~~~~text
62: PHASE B2_BCC %BO 3 0.5 0.5 3 !
63: CONST B2_BCC : AL% FE : AL FE% : VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): B2_BCC, type code %BO, sha256 `7be8d8a9158e1e62…`

~~~~text
48: PHASE B2_BCC %BO 3 0.5 0.5 3 !
49: CONST B2_BCC : AL% FE : AL FE% : VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): B2_BCC, type code %BO, sha256 `7b14112fd3ae4d9c…`

~~~~text
47: PHASE B2_BCC %BO 3 0.5 0.5 3 !
48: CONST B2_BCC : AL% FE : AL FE% : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): B2_BCC, type code %BO, sha256 `01ab7de1d7d061d4…`

~~~~text
56: PHASE B2_BCC %BO 3 0.5 0.5 3 !
57: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): B2_BCC, type code %BO, sha256 `2210cc1e5240d750…`

~~~~text
53: PHASE B2_BCC %BO 3 0.5 0.5 3 !
54: CONST B2_BCC : AL% FE : AL FE% : VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): B2_BCC, type code %BO, sha256 `565fb0ca7ceedee4…`

~~~~text
41: PHASE B2_BCC %BO 3 0.5 0.5 3 !
42: CONST B2_BCC : AL% FE VA : AL FE% VA : VA : !
~~~~

Example references (10 of 12; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_
- [doi:10.1016/j.jallcom.2016.01.215](https://doi.org/10.1016/j.jallcom.2016.01.215) K. Han, I. Ohnuma, R. Kainuma, Experimental determination of phase equilibria of Al-rich portion in the Al–Fe binary system, Journal of Alloys and Compounds 668, 97-106 (2016).  
_cited as the source of values for this phase_

## FCC_4SL (Al–Fe)

- Id: `phase:al-fe:fcc-4sl`; status `needs_review`
- No structure assigned. Why: order_disorder_ambiguity:AlFe-09Sun-no-option-F.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-09Sun.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-17Zhe.tdb_model_is_partitioned; order_disorder_ambiguity:AlFe-21Mur.tdb_model_is_partitioned; unrecognised_name_tokens:4SL
- Candidate (dft_mp): C2/m (12) — on-hull MP Al13Fe4 at x(FE)=0.2353
- Candidate (dft_mp): Pm-3m (221) — on-hull MP AlFe at x(FE)=0.5000
- Candidate (dft_mp): Pm-3m (221) — on-hull MP AlFe3 at x(FE)=0.7500
- Candidate (dft_oqmd): Pm-3m (221) — on-hull OQMD Al1 Fe1 at x(FE)=0.5000
- Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Al1 Fe4 at x(FE)=0.8000
- Candidate (dft_oqmd): C2/m (12) — on-hull OQMD Al1 Fe5 at x(FE)=0.8333
- Candidate (dft_oqmd): C2/m (12) — on-hull OQMD Al13 Fe4 at x(FE)=0.2353
- Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Al2 Fe1 at x(FE)=0.3333
- Stability: stable in 4 of 4 calculated diagram(s): 300–1679.81 K, x(Fe) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:fcc-4sl)

Names (5): _corpus: _corpus:phase:al-fe:fcc-4sl  
_tdb: _tdb:AlFe-09Sun-no-option-F.tdb:FCC_4SL, tdb:AlFe-09Sun.tdb:FCC_4SL, tdb:AlFe-17Zhe.tdb:FCC_4SL, tdb:AlFe-21Mur.tdb:FCC_4SL  


### TDB models of FCC_4SL (4): PHASE and CONSTITUENT statements as written

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): FCC_4SL, type code %AY, sha256 `884d6fe9e57d8ed3…`

~~~~text
50: PHASE FCC_4SL %AY 5 0.25 0.25 0.25 0.25 1 !
51: CONST FCC_4SL : AL FE : AL FE : AL FE : AL% FE : VA :  !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): FCC_4SL, type code %AY, sha256 `5d81bdcb3a4d8f17…`

~~~~text
54: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 !
55: CONST FCC_4SL:F : AL FE : AL FE : AL FE : AL% FE : VA :  !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): FCC_4SL, type code %AY, sha256 `ebe1dc119ebdbd61…`

~~~~text
47: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 !
48: CONST FCC_4SL:F : AL FE : AL FE : AL FE : AL% FE : VA :  !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): FCC_4SL, type code %AY, sha256 `01ab7de1d7d061d4…`

~~~~text
41: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 !
42: CONST FCC_4SL:F : AL FE : AL FE : AL FE : AL% FE : VA :  !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_

## FCC_A1 (Al–Fe)

- Id: `phase:al-fe:fcc-a1`; status `assigned`
- Structure: Cu · A1 · cF4 · Fm-3m (225); type `st:a1-cu-cf4`; tier A: standard phase name; confidence high
- Stability: stable in 11 of 11 calculated diagram(s): 300–1674.47 K, x(Fe) 0–1
- Literature: 15 values (15 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:fcc-a1)

Names (20): _corpus: _corpus:phase:al-fe:fcc-a1  
_paper: _paper:10.1016/j.calphad.2008.07.010:fcc_A1, paper:10.1016/j.jallcom.2018.01.316:fcc, paper:10.1016/j.jallcom.2022.168361:fcc, paper:sha256-85fd53a1a176b694:fcc-Al  
_tdb: _tdb:AlFe-07Zha.tdb:FCC_A1, tdb:AlFe-09Jac.tdb:FCC_A1, tdb:AlFe-09Sun-no-option-F.tdb:A1_FCC, tdb:AlFe-09Sun-no-option-F.tdb:FCC_A1, tdb:AlFe-09Sun.tdb:A1_FCC, tdb:AlFe-09Sun.tdb:FCC_A1, tdb:AlFe-15Mie.tdb:FCC_A1, tdb:AlFe-17Zhe.tdb:A1_FCC, tdb:AlFe-17Zhe.tdb:FCC_A1, tdb:AlFe-18Zie.tdb:FCC_A1, tdb:AlFe-19Ran.tdb:FCC_A1, tdb:AlFe-21Mur.tdb:A1_FCC, tdb:AlFe-21Mur.tdb:FCC_A1, tdb:AlFe-23Ila.tdb:FCC_A1, tdb:AlFe-93Sei-LB.tdb:FCC_A1  


### TDB models of FCC_A1 (15): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): FCC_A1, type code %A, sha256 `64a98b3da69234a7…`

~~~~text
33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): FCC_A1, type code %A, sha256 `3a7e20dfdebcf711…`

~~~~text
27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): A1_FCC, type code %A, sha256 `884d6fe9e57d8ed3…`

~~~~text
45: PHASE A1_FCC %A 2 1 1 !
46: CONST A1_FCC : AL FE : VA : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): FCC_A1, type code %A, sha256 `884d6fe9e57d8ed3…`

~~~~text
40: PHASE FCC_A1 %A 2 1 1 !
41: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): A1_FCC, type code %A, sha256 `5d81bdcb3a4d8f17…`

~~~~text
49: PHASE A1_FCC %A 2 1 1 !
50: CONST A1_FCC : AL FE : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): FCC_A1, type code %A, sha256 `5d81bdcb3a4d8f17…`

~~~~text
44: PHASE FCC_A1 %A 2 1 1 !
45: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): FCC_A1, type code %A, sha256 `b767413d93e5b710…`

~~~~text
29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): A1_FCC, type code %A, sha256 `ebe1dc119ebdbd61…`

~~~~text
42: PHASE A1_FCC %A 2 1 1 !
43: CONST A1_FCC : AL FE : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): FCC_A1, type code %A, sha256 `ebe1dc119ebdbd61…`

~~~~text
37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): FCC_A1, type code %A, sha256 `7be8d8a9158e1e62…`

~~~~text
33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): FCC_A1, type code %A, sha256 `7b14112fd3ae4d9c…`

~~~~text
32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): A1_FCC, type code %A, sha256 `01ab7de1d7d061d4…`

~~~~text
36: PHASE A1_FCC %A 2 1 1 !
37: CONST A1_FCC : AL FE : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): FCC_A1, type code %A, sha256 `01ab7de1d7d061d4…`

~~~~text
31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): FCC_A1, type code %A, sha256 `2210cc1e5240d750…`

~~~~text
38: PHASE FCC_A1 %A 2 1 1 !
39: CONST FCC_A1 : AL FE : VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): FCC_A1, type code %A, sha256 `565fb0ca7ceedee4…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : AL FE : VA : !
~~~~

Example references (10 of 12; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_

## HCP_A3 (Al–Fe)

- Id: `phase:al-fe:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stability: not stable in 10 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:hcp-a3)

Names (11): _corpus: _corpus:phase:al-fe:hcp-a3  
_tdb: _tdb:AlFe-07Zha.tdb:HCP_A3, tdb:AlFe-09Jac.tdb:HCP_A3, tdb:AlFe-09Sun.tdb:HCP_A3, tdb:AlFe-15Mie.tdb:HCP_A3, tdb:AlFe-17Zhe.tdb:HCP_A3, tdb:AlFe-18Zie.tdb:HCP_A3, tdb:AlFe-19Ran.tdb:HCP_A3, tdb:AlFe-21Mur.tdb:HCP_A3, tdb:AlFe-23Ila.tdb:HCP_A3, tdb:AlFe-93Sei-LB.tdb:HCP_A3  


### TDB models of HCP_A3 (10): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): HCP_A3, type code %A, sha256 `64a98b3da69234a7…`

~~~~text
53: PHASE HCP_A3 %A 2 1 0.5 !
54: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): HCP_A3, type code %A, sha256 `3a7e20dfdebcf711…`

~~~~text
47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): HCP_A3, type code %A, sha256 `5d81bdcb3a4d8f17…`

~~~~text
85: PHASE HCP_A3 %A 2 1 0.5 !
86: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): HCP_A3, type code %A, sha256 `b767413d93e5b710…`

~~~~text
39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): HCP_A3, type code %A, sha256 `ebe1dc119ebdbd61…`

~~~~text
73: PHASE HCP_A3 %A 2 1 0.5 !
74: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): HCP_A3, type code %A, sha256 `7be8d8a9158e1e62…`

~~~~text
53: PHASE HCP_A3 %A 2 1 0.5 !
54: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): HCP_A3, type code %A, sha256 `7b14112fd3ae4d9c…`

~~~~text
52: PHASE HCP_A3 %A 2 1 0.5 !
53: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): HCP_A3, type code %A, sha256 `01ab7de1d7d061d4…`

~~~~text
72: PHASE HCP_A3 %A 2 1 0.5 !
73: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): HCP_A3, type code %A, sha256 `2210cc1e5240d750…`

~~~~text
58: PHASE HCP_A3 %A 2 1 0.5 !
59: CONST HCP_A3 : AL FE : VA : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): HCP_A3, type code %A, sha256 `565fb0ca7ceedee4…`

~~~~text
46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : AL FE : VA : !
~~~~

Example references (9 of 9; assessments first): 

- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase_

## LIQUID (Al–Fe)

- Id: `phase:al-fe:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 11 of 11 calculated diagram(s): 922.63–2500 K, x(Fe) 0–1
- Literature: 117 values (114 accepted) from 4 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-fe:liquid)

Names (17): _corpus: _corpus:phase:al-fe:liquid  
_paper: _paper:10.1016/j.calphad.2008.07.010:Liq, paper:10.1016/j.calphad.2008.07.010:liq, paper:10.1016/j.jallcom.2018.01.316:L, paper:10.1016/j.jallcom.2022.168361:L, paper:sha256-85fd53a1a176b694:L  
_tdb: _tdb:AlFe-07Zha.tdb:LIQUID, tdb:AlFe-09Jac.tdb:LIQUID, tdb:AlFe-09Sun-no-option-F.tdb:LIQUID, tdb:AlFe-09Sun.tdb:LIQUID, tdb:AlFe-15Mie.tdb:LIQUID, tdb:AlFe-17Zhe.tdb:LIQUID, tdb:AlFe-18Zie.tdb:LIQUID, tdb:AlFe-19Ran.tdb:LIQUID, tdb:AlFe-21Mur.tdb:LIQUID, tdb:AlFe-23Ila.tdb:LIQUID, tdb:AlFe-93Sei-LB.tdb:LIQUID  


### TDB models of LIQUID (11): PHASE and CONSTITUENT statements as written

[AlFe-07Zha.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-07Zha.tdb): LIQUID, type code %, sha256 `64a98b3da69234a7…`

~~~~text
28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-09Jac.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Jac.tdb): LIQUID, type code %, sha256 `3a7e20dfdebcf711…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-09Sun-no-option-F.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun-no-option-F.tdb): LIQUID, type code %, sha256 `884d6fe9e57d8ed3…`

~~~~text
35: PHASE LIQUID:L % 1 1 !
36: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-09Sun.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-09Sun.tdb): LIQUID, type code %, sha256 `5d81bdcb3a4d8f17…`

~~~~text
39: PHASE LIQUID:L % 1 1 !
40: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-15Mie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-15Mie.tdb): LIQUID, type code %, sha256 `b767413d93e5b710…`

~~~~text
24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-17Zhe.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-17Zhe.tdb): LIQUID, type code %, sha256 `ebe1dc119ebdbd61…`

~~~~text
32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-18Zie.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-18Zie.tdb): LIQUID, type code %, sha256 `7be8d8a9158e1e62…`

~~~~text
28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-19Ran.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-19Ran.tdb): LIQUID, type code %, sha256 `7b14112fd3ae4d9c…`

~~~~text
27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-21Mur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-21Mur.tdb): LIQUID, type code %, sha256 `01ab7de1d7d061d4…`

~~~~text
26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-23Ila.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-23Ila.tdb): LIQUID, type code %, sha256 `2210cc1e5240d750…`

~~~~text
33: PHASE LIQUID:L % 1 1 !
34: CONST LIQUID:L : AL FE : !
~~~~

[AlFe-93Sei-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/AlFe-93Sei-LB.tdb): LIQUID, type code %, sha256 `565fb0ca7ceedee4…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : AL FE : !
~~~~

Example references (10 of 13; assessments first): 

- [doi:10.1016/j.jallcom.2018.01.316](https://doi.org/10.1016/j.jallcom.2018.01.316) Tilo Zienert, Olga Fabrichnaya, Experimental investigation and thermodynamic assessment of the Al-Fe system, Journal of Alloys and Compounds 743, 795-811 (2018).  
_assessment that models this phase; cited as the source of values for this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2022.168361](https://doi.org/10.1016/j.jallcom.2022.168361) M. Ilatovskaia, H. Becker, O. Fabrichnaya, A. Leineweber, The η-Al5Fe2 phase in the Al–Fe system: The issue with the sublattice model, Journal of Alloys and Compounds 936, 168361 (2023).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2008.07.010](https://doi.org/10.1016/j.calphad.2008.07.010) Michel H.G. Jacobs, Rainer Schmid-Fetzer, Phase behavior and thermodynamic properties in the system Fe–Al, Calphad 33, 170-178 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.3139/146.111765](https://doi.org/10.3139/146.111765) M. Rank, P. Franke, H.J. Seifert, Thermodynamic investigations in the Al–Fe system: thermodynamic modeling using CALPHAD, Int. J. Mater. Res. 110 (2019) 406–421, https://doi.org/10.3139/146.111765  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2017.05.003](https://doi.org/10.1016/j.calphad.2017.05.003) W. Zheng, S. He, M. Selleby, Y. He, L. Li, X.-G. Lu, J. Ågren, Thermodynamic assessment of the Al-C-Fe system, Calphad 58 (2017) 34e49, https://doi.org/ 10.1016/j.calphad.2017.05.003. http://www.sciencedirect.com/science/ article/pii/S0364591617300482.  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1016/j.actamat.2009.02.046](https://doi.org/10.1016/j.actamat.2009.02.046) Bo Sundman, Ikuo Ohnuma, Nathalie Dupin, Ursula R. Kattner, Suzana G. Fries, An assessment of the entire Al–Fe system including D03 ordering, Acta Materialia 57, 2896-2908 (2009).  
_assessment that models this phase; cited as the source of values for this phase_
- [doi:10.1007/s11669-015-0383-5](https://doi.org/10.1007/s11669-015-0383-5) Jyrki Miettinen, Seppo Louhenkilpi, Gueorgui Vassilev, Thermodynamic Description of Ternary Fe-X-P Systems. Part 9: Fe-Al-P, J. Phase Equilib. Diffus. 36, 317-326 (2015).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2007.03.003](https://doi.org/10.1016/j.calphad.2007.03.003) Lijun Zhang, Yong Du, Thermodynamic description of the Al–Fe–Ni system over the whole composition and temperature ranges: Modeling coupled with key experiment, Calphad 31, 529-540 (2007).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2021.102360](https://doi.org/10.1016/j.calphad.2021.102360) H. Murdoch, A. Giri, D. Field, E. Hernandez-Rivera, M. Guziewski, Calphad, 75, 102360(2021).  
_assessment that models this phase_
- [doi:10.1007/s11669-015-0446-7](https://doi.org/10.1007/s11669-015-0446-7) Xiaolin Li, Anke Scherf, Martin Heilmaier, Frank Stein, The Al-Rich Part of the Fe-Al Phase Diagram, J. Phase Equilib. Diffus. 37, 162-173 (2016).  
_cited as the source of values for this phase_

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).