# Er–Fe phases > Er–Fe system: 8 phases (tier A 5, tier C 2, liquid 1); 8 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/ER-FE.html · Markdown: https://data.orchid-project.org/phases/pages/ER-FE.md 8 phases (tier A 5, tier C 2, liquid 1); 8 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=ER-FE) · [full JSON](https://data.orchid-project.org/phases/systems/ER-FE.json) · [Er–Fe system page](https://data.orchid-project.org/systems/ER-FE.html) · [Markdown](https://data.orchid-project.org/phases/pages/ER-FE.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Er–Fe system (8) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-er-fe-bcc-a2); _phase:er-fe:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–2499.71 K, x(Fe) 0.98333–1 | 6 | 4 | | [ER2FE17](#phase-er-fe-er2fe17); _phase:er-fe:er2fe17_ | Ni17Th2 · hP38 · P6_3/mmc (194) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 300–1625.28 K, x(Fe) 0.89474–0.89474 | 14 | 4 | | [ER6FE23_D8A](#phase-er-fe-er6fe23-d8a); _phase:er-fe:er6fe23-d8a_ | Mn23Th6 · D8_a · cF116 · Fm-3m (225) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1603.53 K, x(Fe) 0.7931–0.7931 | 12 | 4 | | [ERFE2_C15](#phase-er-fe-erfe2-c15); _phase:er-fe:erfe2-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1640 K, x(Fe) 0.66667–0.66667 | 16 | 4 | | [ERFE3](#phase-er-fe-erfe3); _phase:er-fe:erfe3_ | Ni3Pu · hR12 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 4 of 4 calculated diagram(s): 300–1616.08 K, x(Fe) 0.75–0.75 | 12 | 4 | | [FCC_A1](#phase-er-fe-fcc-a1); _phase:er-fe:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 301.07–1810.85 K, x(Fe) 0.98085–1 | 12 | 4 | | [HCP_A3](#phase-er-fe-hcp-a3); _phase:er-fe:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 4 of 4 calculated diagram(s): 300–1830.54 K, x(Fe) 0–0.00269 | 6 | 4 | | [LIQUID](#phase-er-fe-liquid); _phase:er-fe:liquid_ | liquid | liquid | stable in 4 of 4 calculated diagram(s): 1184.44–2500 K, x(Fe) 0–1 | 62 | 4 | ## BCC_A2 (Er–Fe) - Id: `phase:er-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 4 of 4 calculated diagram(s): 300–2499.71 K, x(Fe) 0.98333–1 - Literature: 6 values (6 accepted) from 2 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:bcc-a2) Names (7): _corpus: _corpus:phase:er-fe:bcc-a2 _paper: _paper:10.1016/j.calphad.2011.04.001:bcc, paper:10.1016/j.jallcom.2011.08.014:(δFe) _tdb: _tdb:ErFe-10Zho.tdb:BCC_A2, tdb:ErFe-11Wan.tdb:BCC_A2, tdb:ErFe-12Wan.tdb:BCC_A2, tdb:ErFe-23Ye.tdb:BCC_A2 ### TDB models of BCC_A2 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): BCC_A2, type code %B, sha256 `1040d981d623df87…` ~~~~text 33: PHASE BCC_A2 %B 2 1 3 ! 34: CONST BCC_A2 : ER FE : VA : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): BCC_A2, type code %B, sha256 `d3d26033abb0e6a6…` ~~~~text 32: PHASE BCC_A2 %B 2 1 3 ! 33: CONST BCC_A2 : ER FE : VA : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): BCC_A2, type code %B, sha256 `9284f49a27f3fe26…` ~~~~text 45: PHASE BCC_A2 %B 2 1 3 ! 46: CONST BCC_A2 : ER FE : VA : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): BCC_A2, type code %B, sha256 `d3f1e827a3153e9e…` ~~~~text 36: PHASE BCC_A2 %B 2 1 3 ! 37: CONST BCC_A2 : ER FE : VA : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## ER2FE17 (Er–Fe) - Id: `phase:er-fe:er2fe17`; status `assigned` - Structure: Ni17Th2 · hP38 · P6_3/mmc (194); type `st:ni17th2-hp38`; 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_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Er 0.1053, Fe 0.8947 - Stability: stable in 4 of 4 calculated diagram(s): 300–1625.28 K, x(Fe) 0.89474–0.89474 - Literature: 14 values (14 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:er2fe17) Names (8): _corpus: _corpus:phase:er-fe:er2fe17 _paper: _paper:10.1016/j.calphad.2011.04.001:Er2Fe17, paper:10.1016/j.jallcom.2011.08.014:Fe17Er2, paper:10.1016/j.physb.2010.05.046:Fe17Er2 _tdb: _tdb:ErFe-10Zho.tdb:ER2FE17, tdb:ErFe-11Wan.tdb:ER2FE17, tdb:ErFe-12Wan.tdb:ER2FE17, tdb:ErFe-23Ye.tdb:ER2FE17 ### TDB models of ER2FE17 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): ER2FE17, type code %, sha256 `1040d981d623df87…` ~~~~text 58: PHASE ER2FE17 % 2 2 17 ! 59: CONST ER2FE17 : ER : FE : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): ER2FE17, type code %A, sha256 `d3d26033abb0e6a6…` ~~~~text 57: PHASE ER2FE17 %A 2 2 17 ! 58: CONST ER2FE17 : ER : FE : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): ER2FE17, type code %A, sha256 `9284f49a27f3fe26…` ~~~~text 70: PHASE ER2FE17 %A 2 2 17 ! 71: CONST ER2FE17 : ER : FE : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): ER2FE17, type code %A, sha256 `d3f1e827a3153e9e…` ~~~~text 61: PHASE ER2FE17 %A 2 2 17 ! 62: CONST ER2FE17 : ER : FE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## ER6FE23_D8A (Er–Fe) - Id: `phase:er-fe:er6fe23-d8a`; status `assigned` - Structure: Mn23Th6 · D8_a · cF116 · Fm-3m (225); type `st:d8-a-mn23th6-cf116`; tier A: standard phase name; confidence high - Stoichiometry: Er 0.2069, Fe 0.7931 - Stability: stable in 4 of 4 calculated diagram(s): 300–1603.53 K, x(Fe) 0.7931–0.7931 - Literature: 12 values (12 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:er6fe23-d8a) Names (8): _corpus: _corpus:phase:er-fe:er6fe23-d8a _paper: _paper:10.1016/j.calphad.2011.04.001:Er6Fe23, paper:10.1016/j.jallcom.2011.08.014:Fe23Er6, paper:10.1016/j.physb.2010.05.046:Fe23Er6 _tdb: _tdb:ErFe-10Zho.tdb:ER6FE23_D8A, tdb:ErFe-11Wan.tdb:ER6FE23_D8A, tdb:ErFe-12Wan.tdb:ER6FE23_D8A, tdb:ErFe-23Ye.tdb:ER6FE23_D8A ### TDB models of ER6FE23_D8A (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): ER6FE23_D8A, type code %, sha256 `1040d981d623df87…` ~~~~text 53: PHASE ER6FE23_D8A % 2 6 23 ! 54: CONST ER6FE23_D8A : ER : FE : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): ER6FE23_D8A, type code %A, sha256 `d3d26033abb0e6a6…` ~~~~text 52: PHASE ER6FE23_D8A %A 2 6 23 ! 53: CONST ER6FE23_D8A : ER : FE : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): ER6FE23_D8A, type code %A, sha256 `9284f49a27f3fe26…` ~~~~text 65: PHASE ER6FE23_D8A %A 2 6 23 ! 66: CONST ER6FE23_D8A : ER : FE : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): ER6FE23_D8A, type code %A, sha256 `d3f1e827a3153e9e…` ~~~~text 56: PHASE ER6FE23_D8A %A 2 6 23 ! 57: CONST ER6FE23_D8A : ER : FE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## ERFE2_C15 (Er–Fe) - Id: `phase:er-fe:erfe2-c15`; status `assigned` - Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaaasg and oqmd-20826, space group 227 - Stoichiometry: Er 0.3333, Fe 0.6667 - Stability: stable in 4 of 4 calculated diagram(s): 300–1640 K, x(Fe) 0.66667–0.66667 - Literature: 16 values (16 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:erfe2-c15) Names (10): _corpus: _corpus:phase:er-fe:erfe2-c15 _mp: _mp:mp-aaaaaasg _oqmd: _oqmd:oqmd-20826 _paper: _paper:10.1016/j.calphad.2011.04.001:ErFe2, paper:10.1016/j.jallcom.2011.08.014:Fe2Er, paper:10.1016/j.physb.2010.05.046:Fe2Er _tdb: _tdb:ErFe-10Zho.tdb:ERFE2_C15, tdb:ErFe-11Wan.tdb:ERFE2_C15, tdb:ErFe-12Wan.tdb:ERFE2_C15, tdb:ErFe-23Ye.tdb:ERFE2_C15 ### TDB models of ERFE2_C15 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): ERFE2_C15, type code %, sha256 `1040d981d623df87…` ~~~~text 43: PHASE ERFE2_C15 % 2 1 2 ! 44: CONST ERFE2_C15 : ER : FE : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): ERFE2_C15, type code %A, sha256 `d3d26033abb0e6a6…` ~~~~text 42: PHASE ERFE2_C15 %A 2 1 2 ! 43: CONST ERFE2_C15 : ER : FE : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): ERFE2_C15, type code %A, sha256 `9284f49a27f3fe26…` ~~~~text 55: PHASE ERFE2_C15 %A 2 1 2 ! 56: CONST ERFE2_C15 : ER : FE : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): ERFE2_C15, type code %A, sha256 `d3f1e827a3153e9e…` ~~~~text 46: PHASE ERFE2_C15 %A 2 1 2 ! 47: CONST ERFE2_C15 : ER : FE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## ERFE3 (Er–Fe) - Id: `phase:er-fe:erfe3`; status `assigned` - Structure: Ni3Pu · hR12 · R-3m (166); type `st:ni3pu-hr12`; 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 (dft_space_group_166_matches_2_structure_types, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system - Stoichiometry: Er 0.2500, Fe 0.7500 - Stability: stable in 4 of 4 calculated diagram(s): 300–1616.08 K, x(Fe) 0.75–0.75 - Literature: 12 values (12 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:erfe3) Names (9): _corpus: _corpus:phase:er-fe:erfe3 _paper: _paper:10.1016/j.calphad.2011.04.001:ErFe3, paper:10.1016/j.jallcom.2011.08.014:Fe3Er, paper:10.1016/j.physb.2010.05.046:Fe3ER, paper:10.1016/j.physb.2010.05.046:Fe3Er _tdb: _tdb:ErFe-10Zho.tdb:ERFE3, tdb:ErFe-11Wan.tdb:ERFE3, tdb:ErFe-12Wan.tdb:ERFE3, tdb:ErFe-23Ye.tdb:ERFE3 ### TDB models of ERFE3 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): ERFE3, type code %, sha256 `1040d981d623df87…` ~~~~text 48: PHASE ERFE3 % 2 1 3 ! 49: CONST ERFE3 : ER : FE : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): ERFE3, type code %A, sha256 `d3d26033abb0e6a6…` ~~~~text 47: PHASE ERFE3 %A 2 1 3 ! 48: CONST ERFE3 : ER : FE : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): ERFE3, type code %A, sha256 `9284f49a27f3fe26…` ~~~~text 60: PHASE ERFE3 %A 2 1 3 ! 61: CONST ERFE3 : ER : FE : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): ERFE3, type code %A, sha256 `d3f1e827a3153e9e…` ~~~~text 51: PHASE ERFE3 %A 2 1 3 ! 52: CONST ERFE3 : ER : FE : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## FCC_A1 (Er–Fe) - Id: `phase:er-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 4 of 4 calculated diagram(s): 301.07–1810.85 K, x(Fe) 0.98085–1 - Literature: 12 values (12 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:fcc-a1) Names (8): _corpus: _corpus:phase:er-fe:fcc-a1 _paper: _paper:10.1016/j.calphad.2011.04.001:fcc, paper:10.1016/j.jallcom.2011.08.014:(γFe), paper:10.1016/j.physb.2010.05.046:Fcc(Fe) _tdb: _tdb:ErFe-10Zho.tdb:FCC_A1, tdb:ErFe-11Wan.tdb:FCC_A1, tdb:ErFe-12Wan.tdb:FCC_A1, tdb:ErFe-23Ye.tdb:FCC_A1 ### TDB models of FCC_A1 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): FCC_A1, type code %A, sha256 `1040d981d623df87…` ~~~~text 28: PHASE FCC_A1 %A 2 1 1 ! 29: CONST FCC_A1 : FE : VA : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): FCC_A1, type code %A, sha256 `d3d26033abb0e6a6…` ~~~~text 27: PHASE FCC_A1 %A 2 1 1 ! 28: CONST FCC_A1 : ER FE% : VA : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): FCC_A1, type code %A, sha256 `9284f49a27f3fe26…` ~~~~text 40: PHASE FCC_A1 %A 2 1 1 ! 41: CONST FCC_A1 : ER FE% : VA : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): FCC_A1, type code %A, sha256 `d3f1e827a3153e9e…` ~~~~text 31: PHASE FCC_A1 %A 2 1 1 ! 32: CONST FCC_A1 : FE : VA : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## HCP_A3 (Er–Fe) - Id: `phase:er-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: stable in 4 of 4 calculated diagram(s): 300–1830.54 K, x(Fe) 0–0.00269 - Literature: 6 values (6 accepted) from 3 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:hcp-a3) Names (8): _corpus: _corpus:phase:er-fe:hcp-a3 _paper: _paper:10.1016/j.calphad.2011.04.001:hcp, paper:10.1016/j.jallcom.2011.08.014:(Er), paper:10.1016/j.physb.2010.05.046:hcp (Er) _tdb: _tdb:ErFe-10Zho.tdb:HCP_A3, tdb:ErFe-11Wan.tdb:HCP_A3, tdb:ErFe-12Wan.tdb:HCP_A3, tdb:ErFe-23Ye.tdb:HCP_A3 ### TDB models of HCP_A3 (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): HCP_A3, type code %, sha256 `1040d981d623df87…` ~~~~text 38: PHASE HCP_A3 % 2 1 0.5 ! 39: CONST HCP_A3 : ER% FE : VA : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): HCP_A3, type code %, sha256 `d3d26033abb0e6a6…` ~~~~text 37: PHASE HCP_A3 % 2 1 0.5 ! 38: CONST HCP_A3 : ER% FE : VA : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): HCP_A3, type code %, sha256 `9284f49a27f3fe26…` ~~~~text 50: PHASE HCP_A3 % 2 1 0.5 ! 51: CONST HCP_A3 : ER% FE : VA : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): HCP_A3, type code %, sha256 `d3f1e827a3153e9e…` ~~~~text 41: PHASE HCP_A3 % 2 1 0.5 ! 42: CONST HCP_A3 : ER% FE : VA : ! ~~~~ Example references (4 of 4; assessments first): - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ ## LIQUID (Er–Fe) - Id: `phase:er-fe:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 4 of 4 calculated diagram(s): 1184.44–2500 K, x(Fe) 0–1 - Literature: 62 values (62 accepted) from 4 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:er-fe:liquid) Names (10): _corpus: _corpus:phase:er-fe:liquid _paper: _paper:10.1016/j.calphad.2011.04.001:L, paper:10.1016/j.jallcom.2011.08.014:L, paper:10.1016/j.physb.2010.05.046:L, paper:10.1016/j.physb.2010.05.046:liquid, paper:10.20517/jmi.2023.08:L _tdb: _tdb:ErFe-10Zho.tdb:LIQUID, tdb:ErFe-11Wan.tdb:LIQUID, tdb:ErFe-12Wan.tdb:LIQUID, tdb:ErFe-23Ye.tdb:LIQUID ### TDB models of LIQUID (4): PHASE and CONSTITUENT statements as written [ErFe-10Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-10Zho.tdb): LIQUID, type code %, sha256 `1040d981d623df87…` ~~~~text 23: PHASE LIQUID:L % 1 1 ! 24: CONST LIQUID:L : ER FE : ! ~~~~ [ErFe-11Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-11Wan.tdb): LIQUID, type code %, sha256 `d3d26033abb0e6a6…` ~~~~text 22: PHASE LIQUID:L % 1 1 ! 23: CONST LIQUID:L : ER FE : ! ~~~~ [ErFe-12Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-12Wan.tdb): LIQUID, type code %, sha256 `9284f49a27f3fe26…` ~~~~text 35: PHASE LIQUID:L % 1 1 ! 36: CONST LIQUID:L : ER FE : ! ~~~~ [ErFe-23Ye.tdb](https://orchid-project.org/data/databases/sgte-binary/ErFe-23Ye.tdb): LIQUID, type code %, sha256 `d3f1e827a3153e9e…` ~~~~text 26: PHASE LIQUID:L % 1 1 ! 27: CONST LIQUID:L : ER FE : ! ~~~~ Example references (5 of 5; assessments first): - [doi:10.1016/j.physb.2010.05.046](https://doi.org/10.1016/j.physb.2010.05.046) G.J. Zhou, Z.W. Liu, D.C. Zeng, Z.P. Jin, Thermodynamic assessment of the Fe–Er system, Physica B: Condensed Matter 405, 3590-3593 (2010). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.jallcom.2011.08.014](https://doi.org/10.1016/j.jallcom.2011.08.014) S.L. Wang, J.J. Han, C.P. Wang, S.Z. Kou, X.J. Liu, Thermodynamic assessment and the composition prediction of amorphous alloy in the Fe–B–Er alloy system, Journal of Alloys and Compounds 513, 27-34 (2012). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2011.04.001](https://doi.org/10.1016/j.calphad.2011.04.001) Wei Wang, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic description of the Er–Fe–Sb system, Calphad 35, 292-301 (2011). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/pssb.19690350154](https://doi.org/10.1002/pssb.19690350154) K. H. J. Buschow, A. S. van der Goot, Phase Relations, Crystal Structures, and Magnetic Properties of Erbium—Iron Compounds, Physica Status Solidi (b) 35, 515-522 (1969). _cited as the source of values for this phase_ - [doi:10.20517/jmi.2023.08](https://doi.org/10.20517/jmi.2023.08) Hongjian Ye, Maohua Rong, Qing Chen, Qingrong Yao, Jiang Wang, Guanghui Rao et al., Assessment of phase equilibria and thermodynamic properties in the Fe-RE (RE = rare earth metals) binary systems, J Mater Inf 3 (2023). _reports 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).