# Au–Tb phases

> Au–Tb system: 13 phases (tier A 8, tier C 4, liquid 1); 13 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/AU-TB.html · Markdown: https://data.orchid-project.org/phases/pages/AU-TB.md

13 phases (tier A 8, tier C 4, liquid 1); 13 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=AU-TB) · [full JSON](https://data.orchid-project.org/phases/systems/AU-TB.json) · [Au–Tb system page](https://data.orchid-project.org/systems/AU-TB.html) · [Markdown](https://data.orchid-project.org/phases/pages/AU-TB.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Au–Tb system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [AU10TB7](#phase-au-tb-au10tb7); _phase:au-tb:au10tb7_ | Au10Gd7 · tI136 · I4_1/acd (142) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1521.82 K, x(Tb) 0.41176–0.41176 | 10 | 2 |
| [AU2TB_C11B](#phase-au-tb-au2tb-c11b); _phase:au-tb:au2tb-c11b_ | MoSi2 · C11_b · tI6 · I4/mmm (139) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1537.78 K, x(Tb) 0.33333–0.33333 | 15 | 2 |
| [AU3TB_D0A](#phase-au-tb-au3tb-d0a); _phase:au-tb:au3tb-d0a_ | beta-Cu3Ti · D0_a · oP8 · Pmmn (59) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1489.02 K, x(Tb) 0.25–0.25 | 15 | 2 |
| [AU4TB3](#phase-au-tb-au4tb3); _phase:au-tb:au4tb3_ | Pd4Pu3 · hR14 · R-3 (148) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1614.02 K, x(Tb) 0.42857–0.42857 | 10 | 2 |
| [AU51TB14](#phase-au-tb-au51tb14); _phase:au-tb:au51tb14_ | Ag51Gd14 · hP68 · P6/m (175) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1445.8 K, x(Tb) 0.21538–0.21538 | 10 | 2 |
| [AU6TB](#phase-au-tb-au6tb); _phase:au-tb:au6tb_ | Au6Sm · tP56 · P4_2/ncm (138) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1130.73 K, x(Tb) 0.14286–0.14286 | 11 | 2 |
| [AUTB_B2](#phase-au-tb-autb-b2); _phase:au-tb:autb-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1723.29–1863.91 K, x(Tb) 0.5–0.5 | 8 | 2 |
| [AUTB_B33](#phase-au-tb-autb-b33); _phase:au-tb:autb-b33_ | CrB · B33 · oC8 · Cmcm (63) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1731.41 K, x(Tb) 0.5–0.5 | 12 | 2 |
| [AUTB2_C37](#phase-au-tb-autb2-c37); _phase:au-tb:autb2-c37_ | Co2Si · C37 · oP12 · Pnma (62) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1272.88 K, x(Tb) 0.66667–0.66667 | 10 | 2 |
| [BCC_A2](#phase-au-tb-bcc-a2); _phase:au-tb:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 1483.16–2499.49 K, x(Tb) 0.98741–1 | 4 | 2 |
| [FCC_A1](#phase-au-tb-fcc-a1); _phase:au-tb:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1484.51 K, x(Tb) 0–0.02096 | 8 | 2 |
| [HCP_A3](#phase-au-tb-hcp-a3); _phase:au-tb:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1626.9 K, x(Tb) 0.98399–1 | 9 | 2 |
| [LIQUID](#phase-au-tb-liquid); _phase:au-tb:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 1072.01–2500 K, x(Tb) 0–1 | 68 | 2 |

## AU10TB7 (Au–Tb)

- Id: `phase:au-tb:au10tb7`; status `assigned`
- Structure: Au10Gd7 · tI136 · I4_1/acd (142); type `st:au10gd7-ti136`; 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: Au 0.5882, Tb 0.4118
- Stability: stable in 2 of 2 calculated diagram(s): 300–1521.82 K, x(Tb) 0.41176–0.41176
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au10tb7)

Names (5): _corpus: _corpus:phase:au-tb:au10tb7  
_paper: _paper:10.1007/s11669-016-0460-4:Au10Tb7, paper:10.1016/j.jallcom.2016.01.260:Tb7Au10  
_tdb: _tdb:AuTb-16Otm.tdb:AU10TB7, tdb:AuTb-16Wan.tdb:AU10TB7  


### TDB models of AU10TB7 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU10TB7, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
71: PHASE AU10TB7 % 2 10 7 !
72: CONST AU10TB7 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU10TB7, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
63: PHASE AU10TB7 % 2 10 7 !
64: CONST AU10TB7 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AU2TB_C11B (Au–Tb)

- Id: `phase:au-tb:au2tb-c11b`; status `assigned`
- Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type `st:c11-b-mosi2-ti6`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.6667, Tb 0.3333
- Stability: stable in 2 of 2 calculated diagram(s): 300–1537.78 K, x(Tb) 0.33333–0.33333
- Literature: 15 values (15 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au2tb-c11b)

Names (5): _corpus: _corpus:phase:au-tb:au2tb-c11b  
_paper: _paper:10.1007/s11669-016-0460-4:Au2Tb, paper:10.1016/j.jallcom.2016.01.260:TbAu2  
_tdb: _tdb:AuTb-16Otm.tdb:AU2TB_C11B, tdb:AuTb-16Wan.tdb:AU2TB_C11B  


### TDB models of AU2TB_C11B (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU2TB_C11B, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
66: PHASE AU2TB_C11B % 2 2 1 !
67: CONST AU2TB_C11B : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU2TB_C11B, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
58: PHASE AU2TB_C11B % 2 2 1 !
59: CONST AU2TB_C11B : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AU3TB_D0A (Au–Tb)

- Id: `phase:au-tb:au3tb-d0a`; status `assigned`
- Structure: beta-Cu3Ti · D0_a · oP8 · Pmmn (59); type `st:d0-a-beta-cu3ti-op8`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacgizm and oqmd-28224, space group 59
- Stoichiometry: Au 0.7500, Tb 0.2500
- Stability: stable in 2 of 2 calculated diagram(s): 300–1489.02 K, x(Tb) 0.25–0.25
- Literature: 15 values (15 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au3tb-d0a)

Names (7): _corpus: _corpus:phase:au-tb:au3tb-d0a  
_mp: _mp:mp-aaacgizm  
_oqmd: _oqmd:oqmd-28224  
_paper: _paper:10.1007/s11669-016-0460-4:Au3Tb, paper:10.1016/j.jallcom.2016.01.260:TbAu3  
_tdb: _tdb:AuTb-16Otm.tdb:AU3TB_D0A, tdb:AuTb-16Wan.tdb:AU3TB_D0A  


### TDB models of AU3TB_D0A (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU3TB_D0A, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
61: PHASE AU3TB_D0A % 2 3 1 !
62: CONST AU3TB_D0A : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU3TB_D0A, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
53: PHASE AU3TB_D0A % 2 3 1 !
54: CONST AU3TB_D0A : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AU4TB3 (Au–Tb)

- Id: `phase:au-tb:au4tb3`; status `assigned`
- Structure: Pd4Pu3 · hR14 · R-3 (148); type `st:pd4pu3-hr14`; 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: Au 0.5714, Tb 0.4286
- Stability: stable in 2 of 2 calculated diagram(s): 300–1614.02 K, x(Tb) 0.42857–0.42857
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au4tb3)

Names (5): _corpus: _corpus:phase:au-tb:au4tb3  
_paper: _paper:10.1007/s11669-016-0460-4:Au4Tb3, paper:10.1016/j.jallcom.2016.01.260:Tb3Au4  
_tdb: _tdb:AuTb-16Otm.tdb:AU4TB3, tdb:AuTb-16Wan.tdb:AU4TB3  


### TDB models of AU4TB3 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU4TB3, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
76: PHASE AU4TB3 % 2 4 3 !
77: CONST AU4TB3 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU4TB3, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
68: PHASE AU4TB3 % 2 4 3 !
69: CONST AU4TB3 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AU51TB14 (Au–Tb)

- Id: `phase:au-tb:au51tb14`; status `assigned`
- Structure: Ag51Gd14 · hP68 · P6/m (175); type `st:ag51gd14-hp68`; 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_oqmd, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Au 0.7846, Tb 0.2154
- Stability: stable in 2 of 2 calculated diagram(s): 300–1445.8 K, x(Tb) 0.21538–0.21538
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au51tb14)

Names (5): _corpus: _corpus:phase:au-tb:au51tb14  
_paper: _paper:10.1007/s11669-016-0460-4:Au51Tb14, paper:10.1016/j.jallcom.2016.01.260:Tb14Au51  
_tdb: _tdb:AuTb-16Otm.tdb:AU51TB14, tdb:AuTb-16Wan.tdb:AU51TB14  


### TDB models of AU51TB14 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU51TB14, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
56: PHASE AU51TB14 % 2 51 14 !
57: CONST AU51TB14 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU51TB14, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
48: PHASE AU51TB14 % 2 51 14 !
49: CONST AU51TB14 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AU6TB (Au–Tb)

- Id: `phase:au-tb:au6tb`; status `assigned`
- Structure: Au6Sm · tP56 · P4_2/ncm (138); type `st:au6sm-tp56`; 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: Au 0.8571, Tb 0.1429
- Stability: stable in 2 of 2 calculated diagram(s): 300–1130.73 K, x(Tb) 0.14286–0.14286
- Literature: 11 values (11 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:au6tb)

Names (5): _corpus: _corpus:phase:au-tb:au6tb  
_paper: _paper:10.1007/s11669-016-0460-4:Au6Tb, paper:10.1016/j.jallcom.2016.01.260:TbAu6  
_tdb: _tdb:AuTb-16Otm.tdb:AU6TB, tdb:AuTb-16Wan.tdb:AU6TB  


### TDB models of AU6TB (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AU6TB, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
51: PHASE AU6TB % 2 6 1 !
52: CONST AU6TB : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AU6TB, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
43: PHASE AU6TB % 2 6 1 !
44: CONST AU6TB : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AUTB_B2 (Au–Tb)

- Id: `phase:au-tb:autb-b2`; status `assigned`
- Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.5000, Tb 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 1723.29–1863.91 K, x(Tb) 0.5–0.5
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:autb-b2)

Names (5): _corpus: _corpus:phase:au-tb:autb-b2  
_paper: _paper:10.1007/s11669-016-0460-4:βAuTb, paper:10.1016/j.jallcom.2016.01.260:βTbAu  
_tdb: _tdb:AuTb-16Otm.tdb:AUTB_B2, tdb:AuTb-16Wan.tdb:AUTB_B2  


### TDB models of AUTB_B2 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AUTB_B2, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
86: PHASE AUTB_B2 % 2 1 1 !
87: CONST AUTB_B2 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AUTB_B2, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
78: PHASE AUTB_B2 % 2 1 1 !
79: CONST AUTB_B2 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AUTB_B33 (Au–Tb)

- Id: `phase:au-tb:autb-b33`; status `assigned`
- Structure: CrB · B33 · oC8 · Cmcm (63); type `st:b33-crb-oc8`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.5000, Tb 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1731.41 K, x(Tb) 0.5–0.5
- Literature: 12 values (12 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:autb-b33)

Names (6): _corpus: _corpus:phase:au-tb:autb-b33  
_paper: _paper:10.1007/s11669-016-0460-4:αAuTb, paper:10.1016/j.jallcom.2016.01.260:TbAu, paper:10.1016/j.jallcom.2016.01.260:αTbAu  
_tdb: _tdb:AuTb-16Otm.tdb:AUTB_B33, tdb:AuTb-16Wan.tdb:AUTB_B33  


### TDB models of AUTB_B33 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AUTB_B33, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
81: PHASE AUTB_B33 % 2 1 1 !
82: CONST AUTB_B33 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AUTB_B33, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
73: PHASE AUTB_B33 % 2 1 1 !
74: CONST AUTB_B33 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## AUTB2_C37 (Au–Tb)

- Id: `phase:au-tb:autb2-c37`; status `assigned`
- Structure: Co2Si · C37 · oP12 · Pnma (62); type `st:c37-co2si-op12`; tier A: standard phase name; confidence high
- Stoichiometry: Au 0.3333, Tb 0.6667
- Stability: stable in 2 of 2 calculated diagram(s): 300–1272.88 K, x(Tb) 0.66667–0.66667
- Literature: 10 values (10 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:autb2-c37)

Names (5): _corpus: _corpus:phase:au-tb:autb2-c37  
_paper: _paper:10.1007/s11669-016-0460-4:AuTb2, paper:10.1016/j.jallcom.2016.01.260:Tb2Au  
_tdb: _tdb:AuTb-16Otm.tdb:AUTB2_C37, tdb:AuTb-16Wan.tdb:AUTB2_C37  


### TDB models of AUTB2_C37 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): AUTB2_C37, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
91: PHASE AUTB2_C37 % 2 1 2 !
92: CONST AUTB2_C37 : AU : TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): AUTB2_C37, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
83: PHASE AUTB2_C37 % 2 1 2 !
84: CONST AUTB2_C37 : AU : TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## BCC_A2 (Au–Tb)

- Id: `phase:au-tb: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 2 of 2 calculated diagram(s): 1483.16–2499.49 K, x(Tb) 0.98741–1
- Literature: 4 values (4 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:bcc-a2)

Names (5): _corpus: _corpus:phase:au-tb:bcc-a2  
_paper: _paper:10.1007/s11669-016-0460-4:(βTb), paper:10.1016/j.jallcom.2016.01.260:(βTb)  
_tdb: _tdb:AuTb-16Otm.tdb:BCC_A2, tdb:AuTb-16Wan.tdb:BCC_A2  


### TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): BCC_A2, type code %B, sha256 `3d40e677f0e61d9c…`

~~~~text
41: PHASE BCC_A2 %B 2 1 3 !
42: CONST BCC_A2 : AU TB% : VA : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): BCC_A2, type code %B, sha256 `79c53dab2d6a949a…`

~~~~text
33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : AU TB% : VA : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## FCC_A1 (Au–Tb)

- Id: `phase:au-tb: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 2 of 2 calculated diagram(s): 300–1484.51 K, x(Tb) 0–0.02096
- Literature: 8 values (8 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:fcc-a1)

Names (5): _corpus: _corpus:phase:au-tb:fcc-a1  
_paper: _paper:10.1007/s11669-016-0460-4:(Au), paper:10.1016/j.jallcom.2016.01.260:(Au)  
_tdb: _tdb:AuTb-16Otm.tdb:FCC_A1, tdb:AuTb-16Wan.tdb:FCC_A1  


### TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): FCC_A1, type code %A, sha256 `3d40e677f0e61d9c…`

~~~~text
36: PHASE FCC_A1 %A 2 1 1 !
37: CONST FCC_A1 : AU% TB : VA : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): FCC_A1, type code %A, sha256 `79c53dab2d6a949a…`

~~~~text
28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : AU% TB : VA : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## HCP_A3 (Au–Tb)

- Id: `phase:au-tb: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 2 of 2 calculated diagram(s): 300–1626.9 K, x(Tb) 0.98399–1
- Literature: 9 values (9 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:hcp-a3)

Names (5): _corpus: _corpus:phase:au-tb:hcp-a3  
_paper: _paper:10.1007/s11669-016-0460-4:(αTb), paper:10.1016/j.jallcom.2016.01.260:(αTb)  
_tdb: _tdb:AuTb-16Otm.tdb:HCP_A3, tdb:AuTb-16Wan.tdb:HCP_A3  


### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): HCP_A3, type code %A, sha256 `3d40e677f0e61d9c…`

~~~~text
46: PHASE HCP_A3 %A 2 1 0.5 !
47: CONST HCP_A3 : AU TB% : VA : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): HCP_A3, type code %A, sha256 `79c53dab2d6a949a…`

~~~~text
38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : AU TB% : VA : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_cited as the source of values for this phase_

## LIQUID (Au–Tb)

- Id: `phase:au-tb:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 1072.01–2500 K, x(Tb) 0–1
- Literature: 68 values (68 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:au-tb:liquid)

Names (5): _corpus: _corpus:phase:au-tb:liquid  
_paper: _paper:10.1007/s11669-016-0460-4:L, paper:10.1016/j.jallcom.2016.01.260:L  
_tdb: _tdb:AuTb-16Otm.tdb:LIQUID, tdb:AuTb-16Wan.tdb:LIQUID  


### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

[AuTb-16Otm.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Otm.tdb): LIQUID, type code %, sha256 `3d40e677f0e61d9c…`

~~~~text
31: PHASE LIQUID:L % 1 1 !
32: CONST LIQUID:L : AU TB : !
~~~~

[AuTb-16Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/AuTb-16Wan.tdb): LIQUID, type code %, sha256 `79c53dab2d6a949a…`

~~~~text
23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : AU TB : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/j.jallcom.2016.01.260](https://doi.org/10.1016/j.jallcom.2016.01.260) Samira Otmani, Kamal Mahdouk, Thermodynamic assessment of the terbium–gold binary system, Journal of Alloys and Compounds 670, 369-373 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-016-0460-4](https://doi.org/10.1007/s11669-016-0460-4) S. L. Wang, J. L. Li, L. L. Qiu, L. J. Zhou, Y. H. Li, C. Q. Ren et al., Thermodynamic Assessments of the Au-Tb and Au-Lu Systems, J. Phase Equilib. Diffus. 37, 319-326 (2016).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/s0966-9795(99)00099-0](https://doi.org/10.1016/s0966-9795%2899%2900099-0) A Saccone, D Macciò, S Delfino, R Ferro, The phase diagram of the terbium–gold alloy system, Intermetallics 8, 229-237 (2000).  
_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).