# Ga–Pt phases

> Ga–Pt system: 13 phases (tier A 9, tier C 1, liquid 1, needs_review 2); 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/GA-PT.html · Markdown: https://data.orchid-project.org/phases/pages/GA-PT.md

13 phases (tier A 9, tier C 1, liquid 1, needs_review 2); 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=GA-PT) · [full JSON](https://data.orchid-project.org/phases/systems/GA-PT.json) · [Ga–Pt system page](https://data.orchid-project.org/systems/GA-PT.html) · [Markdown](https://data.orchid-project.org/phases/pages/GA-PT.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Ga–Pt system (13)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [ORTHORHOMBIC_A11](#phase-ga-pt-a11-orthorhombic); _phase:ga-pt:a11-orthorhombic_ | alpha-Ga · A11 · oC8 · Cmce (64) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–302.91 K, x(Pt) 0–0 | 2 | 2 |
| [BCC_A2](#phase-ga-pt-bcc-a2); _phase:ga-pt:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [FCC_A1](#phase-ga-pt-fcc-a1); _phase:ga-pt:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2499 K, x(Pt) 0.87794–1 | 2 | 2 |
| [GA2PT_C1](#phase-ga-pt-ga2pt-c1); _phase:ga-pt:ga2pt-c1_ | CaF2 · C1 · cF12 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 437.47–1197.77 K, x(Pt) 0.33333–0.33333 | 10 | 2 |
| [GA3PT2_D513](#phase-ga-pt-ga3pt2-d513); _phase:ga-pt:ga3pt2-d513_ | Ni2Al3 · D5_13 · hP5 · P-3m1 (164) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1215.1 K, x(Pt) 0.4–0.4 | 9 | 2 |
| [GA3PT5](#phase-ga-pt-ga3pt5); _phase:ga-pt:ga3pt5_ | Ga3Pt5 · oC16 · Cmmm (65) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1404.57 K, x(Pt) 0.625–0.625 | 7 | 2 |
| [GA6PT](#phase-ga-pt-ga6pt); _phase:ga-pt:ga6pt_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–564.71 K, x(Pt) 0.14286–0.14286 | 5 | 2 |
| [GA7PT3_D8F](#phase-ga-pt-ga7pt3-d8f); _phase:ga-pt:ga7pt3-d8f_ | Ru3Sn7 · D8_f · cI40 · Im-3m (229) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1097.49 K, x(Pt) 0.3–0.3 | 9 | 2 |
| [GAPT_B20](#phase-ga-pt-gapt-b20); _phase:ga-pt:gapt-b20_ | FeSi · B20 · cP8 · P2_13 (198) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1375.12 K, x(Pt) 0.5–0.5 | 5 | 2 |
| [GAPT2](#phase-ga-pt-gapt2); _phase:ga-pt:gapt2_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1416.36 K, x(Pt) 0.66667–0.66667 | 6 | 2 |
| [GAPT3_L12](#phase-ga-pt-gapt3-l12); _phase:ga-pt:gapt3-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1654.17 K, x(Pt) 0.70153–0.77285 | 6 | 2 |
| [HCP_A3](#phase-ga-pt-hcp-a3); _phase:ga-pt:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 2 |
| [LIQUID](#phase-ga-pt-liquid); _phase:ga-pt:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 302.91–2500 K, x(Pt) 0–1 | 26 | 2 |

## ORTHORHOMBIC_A11 (Ga–Pt)

- Id: `phase:ga-pt:a11-orthorhombic`; status `assigned`
- Structure: alpha-Ga · A11 · oC8 · Cmce (64); type `st:a11-alpha-ga-oc8`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 1.0000
- Stability: stable in 2 of 2 calculated diagram(s): 300–302.91 K, x(Pt) 0–0
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:a11-orthorhombic)

Names (5): _corpus: _corpus:phase:ga-pt:a11-orthorhombic, corpus:phase:ga-pt:orthorhombic-a11  
_paper: _paper:10.1016/j.intermet.2005.12.002:Ga  
_tdb: _tdb:GaPt-06Li.tdb:ORTHORHOMBIC_A11, tdb:GaPt-09Wan.tdb:ORTHORHOMBIC_A11  


### TDB models of ORTHORHOMBIC_A11 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): ORTHORHOMBIC_A11, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
47: PHASE ORTHORHOMBIC_A11 % 1 1 !
48: CONST ORTHORHOMBIC_A11 : GA : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): ORTHORHOMBIC_A11, type code %, sha256 `4b15a52b448c0356…`

~~~~text
52: PHASE ORTHORHOMBIC_A11 % 1 1 !
53: CONST ORTHORHOMBIC_A11 : GA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## BCC_A2 (Ga–Pt)

- Id: `phase:ga-pt:bcc-a2`; status `assigned`
- Structure: W · A2 · cI2 · Im-3m (229); type `st:a2-w-ci2`; tier A: standard phase name; confidence high
- Stability: not stable in 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:bcc-a2)

Names (3): _corpus: _corpus:phase:ga-pt:bcc-a2  
_tdb: _tdb:GaPt-06Li.tdb:BCC_A2, tdb:GaPt-09Wan.tdb:BCC_A2  


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

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): BCC_A2, type code %B, sha256 `bb7e55a289ba2227…`

~~~~text
37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : GA PT : VA : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): BCC_A2, type code %B, sha256 `4b15a52b448c0356…`

~~~~text
42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : GA PT : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase_

## FCC_A1 (Ga–Pt)

- Id: `phase:ga-pt: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): 300–2499 K, x(Pt) 0.87794–1
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:fcc-a1)

Names (4): _corpus: _corpus:phase:ga-pt:fcc-a1  
_paper: _paper:10.1016/j.intermet.2005.12.002:fcc  
_tdb: _tdb:GaPt-06Li.tdb:FCC_A1, tdb:GaPt-09Wan.tdb:FCC_A1  


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

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): FCC_A1, type code %A, sha256 `bb7e55a289ba2227…`

~~~~text
32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : GA PT% : VA : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): FCC_A1, type code %A, sha256 `4b15a52b448c0356…`

~~~~text
37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : GA PT% : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GA2PT_C1 (Ga–Pt)

- Id: `phase:ga-pt:ga2pt-c1`; status `assigned`
- Structure: CaF2 · C1 · cF12 · Fm-3m (225); type `st:c1-caf2-cf12`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaabgrv and oqmd-17288, space group 225
- Stoichiometry: Ga 0.6667, Pt 0.3333
- Stability: stable in 2 of 2 calculated diagram(s): 437.47–1197.77 K, x(Pt) 0.33333–0.33333
- Literature: 10 values (10 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:ga2pt-c1)

Names (6): _corpus: _corpus:phase:ga-pt:ga2pt-c1  
_mp: _mp:mp-aaaabgrv  
_oqmd: _oqmd:oqmd-17288  
_paper: _paper:10.1016/j.intermet.2005.12.002:Ga2Pt  
_tdb: _tdb:GaPt-06Li.tdb:GA2PT_C1, tdb:GaPt-09Wan.tdb:GA2PT_C1  


### TDB models of GA2PT_C1 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GA2PT_C1, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
62: PHASE GA2PT_C1 % 2 2 1 !
63: CONST GA2PT_C1 : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GA2PT_C1, type code %, sha256 `4b15a52b448c0356…`

~~~~text
67: PHASE GA2PT_C1 % 2 2 1 !
68: CONST GA2PT_C1 : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GA3PT2_D513 (Ga–Pt)

- Id: `phase:ga-pt:ga3pt2-d513`; status `assigned`
- Structure: Ni2Al3 · D5_13 · hP5 · P-3m1 (164); type `st:d5-13-ni2al3-hp5`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.6000, Pt 0.4000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1215.1 K, x(Pt) 0.4–0.4
- Literature: 9 values (9 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:ga3pt2-d513)

Names (4): _corpus: _corpus:phase:ga-pt:ga3pt2-d513  
_paper: _paper:10.1016/j.intermet.2005.12.002:Ga3Pt2  
_tdb: _tdb:GaPt-06Li.tdb:GA3PT2_D513, tdb:GaPt-09Wan.tdb:GA3PT2_D513  


### TDB models of GA3PT2_D513 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GA3PT2_D513, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
67: PHASE GA3PT2_D513 % 2 3 2 !
68: CONST GA3PT2_D513 : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GA3PT2_D513, type code %, sha256 `4b15a52b448c0356…`

~~~~text
72: PHASE GA3PT2_D513 % 2 3 2 !
73: CONST GA3PT2_D513 : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GA3PT5 (Ga–Pt)

- Id: `phase:ga-pt:ga3pt5`; status `assigned`
- Structure: Ga3Pt5 · oC16 · Cmmm (65); type `st:ga3pt5-oc16`; 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: Ga 0.3750, Pt 0.6250
- Stability: stable in 2 of 2 calculated diagram(s): 300–1404.57 K, x(Pt) 0.625–0.625
- Literature: 7 values (7 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:ga3pt5)

Names (6): _corpus: _corpus:phase:ga-pt:ga3pt5  
_paper: _paper:10.1016/j.calphad.2009.05.002:Ga3Pt5, paper:10.1016/j.intermet.2005.12.002:Ga3Pt5, paper:10.1016/j.intermet.2005.12.002:Ga5Pt3  
_tdb: _tdb:GaPt-06Li.tdb:GA3PT5, tdb:GaPt-09Wan.tdb:GA3PT5  


### TDB models of GA3PT5 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GA3PT5, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
77: PHASE GA3PT5 % 2 3 5 !
78: CONST GA3PT5 : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GA3PT5, type code %, sha256 `4b15a52b448c0356…`

~~~~text
82: PHASE GA3PT5 % 2 3 5 !
83: CONST GA3PT5 : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase; reports values for this phase_

## GA6PT (Ga–Pt)

- Id: `phase:ga-pt:ga6pt`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (literature_printed): (Ga6Pt) · ? — printed with a label mapped to this phase
- Candidate (sgte_mmc2): (Ga6Pt) — Hallstedt 2025 mmc2 row for GA6PT: Ga6Pt
- Stoichiometry: Ga 0.8571, Pt 0.1429
- Stability: stable in 2 of 2 calculated diagram(s): 300–564.71 K, x(Pt) 0.14286–0.14286
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:ga6pt)

Names (4): _corpus: _corpus:phase:ga-pt:ga6pt  
_paper: _paper:10.1016/j.intermet.2005.12.002:Ga6Pt  
_tdb: _tdb:GaPt-06Li.tdb:GA6PT, tdb:GaPt-09Wan.tdb:GA6PT  


### TDB models of GA6PT (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GA6PT, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
52: PHASE GA6PT % 2 6 1 !
53: CONST GA6PT : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GA6PT, type code %, sha256 `4b15a52b448c0356…`

~~~~text
57: PHASE GA6PT % 2 6 1 !
58: CONST GA6PT : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GA7PT3_D8F (Ga–Pt)

- Id: `phase:ga-pt:ga7pt3-d8f`; status `assigned`
- Structure: Ru3Sn7 · D8_f · cI40 · Im-3m (229); type `st:d8-f-ru3sn7-ci40`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaacpqea and oqmd-22205, space group 229
- Stoichiometry: Ga 0.7000, Pt 0.3000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1097.49 K, x(Pt) 0.3–0.3
- Literature: 9 values (9 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:ga7pt3-d8f)

Names (6): _corpus: _corpus:phase:ga-pt:ga7pt3-d8f  
_mp: _mp:mp-aaacpqea  
_oqmd: _oqmd:oqmd-22205  
_paper: _paper:10.1016/j.intermet.2005.12.002:Ga7Pt3  
_tdb: _tdb:GaPt-06Li.tdb:GA7PT3_D8F, tdb:GaPt-09Wan.tdb:GA7PT3_D8F  


### TDB models of GA7PT3_D8F (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GA7PT3_D8F, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
57: PHASE GA7PT3_D8F % 2 7 3 !
58: CONST GA7PT3_D8F : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GA7PT3_D8F, type code %, sha256 `4b15a52b448c0356…`

~~~~text
62: PHASE GA7PT3_D8F % 2 7 3 !
63: CONST GA7PT3_D8F : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GAPT_B20 (Ga–Pt)

- Id: `phase:ga-pt:gapt-b20`; status `assigned`
- Structure: FeSi · B20 · cP8 · P2_13 (198); type `st:b20-fesi-cp8`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.5000, Pt 0.5000
- Stability: stable in 2 of 2 calculated diagram(s): 300–1375.12 K, x(Pt) 0.5–0.5
- Literature: 5 values (5 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:gapt-b20)

Names (4): _corpus: _corpus:phase:ga-pt:gapt-b20  
_paper: _paper:10.1016/j.intermet.2005.12.002:GaPt  
_tdb: _tdb:GaPt-06Li.tdb:GAPT_B20, tdb:GaPt-09Wan.tdb:GAPT_B20  


### TDB models of GAPT_B20 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GAPT_B20, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
72: PHASE GAPT_B20 % 2 1 1 !
73: CONST GAPT_B20 : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GAPT_B20, type code %, sha256 `4b15a52b448c0356…`

~~~~text
77: PHASE GAPT_B20 % 2 1 1 !
78: CONST GAPT_B20 : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## GAPT2 (Ga–Pt)

- Id: `phase:ga-pt:gapt2`; status `needs_review`
- No structure assigned. Why: no_structure_token; sgte_mmc2_row_disagrees_with_dft; sgte_mmc2_rows_disagree
- Candidate (dft_mp): Pmma (51) — on-hull MP GaPt2 at x(PT)=0.6667
- Candidate (dft_oqmd): Pmma (51) — on-hull OQMD Ga1 Pt2 at x(PT)=0.6667
- Candidate (literature_printed): GaPt2 · oP24 — printed with a label mapped to this phase
- Candidate (sgte_mmc2): GaPt2 · oP24 · Pmma (51) — Hallstedt 2025 mmc2 row for GAPT2: GaPt2 (LT)
- Candidate (sgte_mmc2): Pb3Sr · tP4 · P4/mmm (123) — Hallstedt 2025 mmc2 row for GAPT2: GaPt2 (high T)
- Candidate (tdb_comment): GaPt2 · oP24 · Pmma — GaPt-06Li.tdb: 'Prototype GaPt2 (oP24, Pmma), low T'
- Candidate (tdb_comment): Pb3Sr · tP4 · P4/mmm — GaPt-06Li.tdb: 'Prototype Pb3Sr (tP4, P4/mmm), high T'
- Candidate (tdb_comment): GaPt2 · oP24 · Pmma — GaPt-09Wan.tdb: 'Prototype GaPt2 (oP24, Pmma), low T'
- Stoichiometry: Ga 0.3333, Pt 0.6667
- Stability: stable in 2 of 2 calculated diagram(s): 300–1416.36 K, x(Pt) 0.66667–0.66667
- Literature: 6 values (6 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:gapt2)

Names (5): _corpus: _corpus:phase:ga-pt:gapt2  
_paper: _paper:10.1016/j.calphad.2009.05.002:GaPt2, paper:10.1016/j.intermet.2005.12.002:GaPt2  
_tdb: _tdb:GaPt-06Li.tdb:GAPT2, tdb:GaPt-09Wan.tdb:GAPT2  


### TDB models of GAPT2 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GAPT2, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
83: PHASE GAPT2 % 2 1 2 !
84: CONST GAPT2 : GA : PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GAPT2, type code %, sha256 `4b15a52b448c0356…`

~~~~text
88: PHASE GAPT2 % 2 1 2 !
89: CONST GAPT2 : GA : PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase; reports values for this phase_

## GAPT3_L12 (Ga–Pt)

- Id: `phase:ga-pt:gapt3-l12`; status `assigned`
- Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type `st:l1-2-aucu3-cp4`; tier A: standard phase name; confidence high
- Caveat: partitioned order/disorder model in GaPt-06Li.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in GaPt-09Wan.tdb also describes the disordered state
- Stability: stable in 2 of 2 calculated diagram(s): 300–1654.17 K, x(Pt) 0.70153–0.77285
- Literature: 6 values (6 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:gapt3-l12)

Names (4): _corpus: _corpus:phase:ga-pt:gapt3-l12  
_paper: _paper:10.1016/j.intermet.2005.12.002:GaPt3  
_tdb: _tdb:GaPt-06Li.tdb:GAPT3_L12, tdb:GaPt-09Wan.tdb:GAPT3_L12  


### TDB models of GAPT3_L12 (2): PHASE and CONSTITUENT statements as written

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): GAPT3_L12, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
88: PHASE GAPT3_L12 % 2 1 3 !
89: CONST GAPT3_L12 : GA% PT : GA PT% : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): GAPT3_L12, type code %, sha256 `4b15a52b448c0356…`

~~~~text
93: PHASE GAPT3_L12 % 2 1 3 !
94: CONST GAPT3_L12 : GA% PT : GA PT% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_

## HCP_A3 (Ga–Pt)

- Id: `phase:ga-pt: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 2 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:hcp-a3)

Names (3): _corpus: _corpus:phase:ga-pt:hcp-a3  
_tdb: _tdb:GaPt-06Li.tdb:HCP_A3, tdb:GaPt-09Wan.tdb:HCP_A3  


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

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): HCP_A3, type code %A, sha256 `bb7e55a289ba2227…`

~~~~text
42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : GA PT : VA : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): HCP_A3, type code %A, sha256 `4b15a52b448c0356…`

~~~~text
47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : GA PT : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase_

## LIQUID (Ga–Pt)

- Id: `phase:ga-pt:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 2 of 2 calculated diagram(s): 302.91–2500 K, x(Pt) 0–1
- Literature: 26 values (26 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pt:liquid)

Names (4): _corpus: _corpus:phase:ga-pt:liquid  
_paper: _paper:10.1016/j.intermet.2005.12.002:L  
_tdb: _tdb:GaPt-06Li.tdb:LIQUID, tdb:GaPt-09Wan.tdb:LIQUID  


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

[GaPt-06Li.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-06Li.tdb): LIQUID, type code %, sha256 `bb7e55a289ba2227…`

~~~~text
27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : GA PT : !
~~~~

[GaPt-09Wan.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPt-09Wan.tdb): LIQUID, type code %, sha256 `4b15a52b448c0356…`

~~~~text
32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : GA PT : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.intermet.2005.12.002](https://doi.org/10.1016/j.intermet.2005.12.002) Mei Li, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic assessment of the Ga–Pt system, Intermetallics 14, 826-831 (2006).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.05.002](https://doi.org/10.1016/j.calphad.2009.05.002) J.S. Wang, S. Jin, W.J. Zhu, H.Q. Dong, X.M. Tao, H.S. Liu et al., First-principles calculations assisted thermodynamic assessment of the Pt–Ga–Ge ternary system, Calphad 33, 561-569 (2009).  
_assessment that models 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).