# Ga–Pu phases

> Ga–Pu system: 25 phases (tier A 10, tier C 6, liquid 1, needs_review 8); 24 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-PU.html · Markdown: https://data.orchid-project.org/phases/pages/GA-PU.md

25 phases (tier A 10, tier C 6, liquid 1, needs_review 8); 24 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-PU) · [full JSON](https://data.orchid-project.org/phases/systems/GA-PU.json) · [Ga–Pu system page](https://data.orchid-project.org/systems/GA-PU.html) · [Markdown](https://data.orchid-project.org/phases/pages/GA-PU.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md)

Table: Phases of the Ga–Pu system (25)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [ORTHORHOMBIC_A11](#phase-ga-pu-a11-orthorhombic); _phase:ga-pu:a11-orthorhombic_ | alpha-Ga · A11 · oC8 · Cmce (64) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–302.91 K, x(Pu) 0–0 | 0 | 1 |
| [TETRAGONAL_A6](#phase-ga-pu-a6-tetragonal); _phase:ga-pu:a6-tetragonal_ | In · A6 · tI2 · I4/mmm (139) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 730.57–755.57 K, x(Pu) 1–1 | 0 | 1 |
| [BCC_A2](#phase-ga-pu-bcc-a2); _phase:ga-pu:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 754.92–988.91 K, x(Pu) 0.89601–1 | 0 | 1 |
| [FCC_A1](#phase-ga-pu-fcc-a1); _phase:ga-pu:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 330.59–921.99 K, x(Pu) 0.85636–1 | 0 | 1 |
| [GA11PU3](#phase-ga-pu-ga11pu3); _phase:ga-pu:ga11pu3_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–666.88 K, x(Pu) 0.21429–0.21429 | 0 | 1 |
| [GA15PU2](#phase-ga-pu-ga15pu2); _phase:ga-pu:ga15pu2_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–347.03 K, x(Pu) 0.11765–0.11765 | 0 | 1 |
| [GA2PU_C32](#phase-ga-pu-ga2pu-c32); _phase:ga-pu:ga2pu-c32_ | AlB2 · C32 · hP3 · P6/mmm (191) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1534.88 K, x(Pu) 0.33333–0.33333 | 0 | 1 |
| [GA3PU_D019](#phase-ga-pu-ga3pu-d019); _phase:ga-pu:ga3pu-d019_ | Ni3Sn · D0_19 · hP8 · P6_3/mmc (194) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 500–1196.16 K, x(Pu) 0.25–0.25 | 0 | 1 |
| [GA3PU_HT](#phase-ga-pu-ga3pu-ht); _phase:ga-pu:ga3pu-ht_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 1196.16–1357.74 K, x(Pu) 0.25–0.25 | 0 | 1 |
| [GA3PU_LT](#phase-ga-pu-ga3pu-lt); _phase:ga-pu:ga3pu-lt_ | InMg3 · hR16 · R-3m (166) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–500 K, x(Pu) 0.25–0.25 | 0 | 1 |
| [GA3PU2](#phase-ga-pu-ga3pu2); _phase:ga-pu:ga3pu2_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–993.92 K, x(Pu) 0.4–0.4 | 0 | 1 |
| [GA3PU5_D8M](#phase-ga-pu-ga3pu5-d8m); _phase:ga-pu:ga3pu5-d8m_ | W5Si3 · D8_m · tI32 · I4/mcm (140) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1037.14 K, x(Pu) 0.625–0.625 | 0 | 1 |
| [GA4PU_D1B](#phase-ga-pu-ga4pu-d1b); _phase:ga-pu:ga4pu-d1b_ | Al4U · D1_b · oI20 · Imma (74) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–745.07 K, x(Pu) 0.2–0.2 | 0 | 1 |
| [GA6PU](#phase-ga-pu-ga6pu); _phase:ga-pu:ga6pu_ | Ga6Pu · tP14 · P4/nbm (125) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–588.63 K, x(Pu) 0.14286–0.14286 | 0 | 1 |
| [GA7PU2](#phase-ga-pu-ga7pu2); _phase:ga-pu:ga7pu2_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–502.84 K, x(Pu) 0.22222–0.22222 | 0 | 1 |
| [GAPU_HT](#phase-ga-pu-gapu-ht); _phase:ga-pu:gapu-ht_ | GaPu · tI16 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 840.93–1273.28 K, x(Pu) 0.5–0.5 | 0 | 1 |
| [GAPU_LT](#phase-ga-pu-gapu-lt); _phase:ga-pu:gapu-lt_ | GaPu · tI16 · I4mm (107) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–840.93 K, x(Pu) 0.5–0.5 | 0 | 1 |
| [GAPU2_ETA](#phase-ga-pu-gapu2-eta); _phase:ga-pu:gapu2-eta_ | CoU · B_a · cI16 · I2_13 (199) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 939.61–1198.49 K, x(Pu) 0.58349–0.77278 | 0 | 1 |
| [GAPU3_LT](#phase-ga-pu-gapu3); _phase:ga-pu:gapu3_ | Pb3Sr · tP4 · P4/mmm (123) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 1 of 1 calculated diagram(s): 300–636 K, x(Pu) 0.75–0.75 | 0 | 1 |
| [GAPU3_L12](#phase-ga-pu-gapu3-l12); _phase:ga-pu:gapu3-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 636–941.57 K, x(Pu) 0.75–0.75 | 0 | 1 |
| [HCP_A3](#phase-ga-pu-hcp-a3); _phase:ga-pu:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 1 calculated diagram(s) | 0 | 1 |
| [LIQUID](#phase-ga-pu-liquid); _phase:ga-pu:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 302.91–4000 K, x(Pu) 0–1 | 0 | 1 |
| [ALPHA_PU](#phase-ga-pu-pu-alpha); _phase:ga-pu:pu-alpha_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1 | 0 | 1 |
| [BETA_PU](#phase-ga-pu-pu-beta); _phase:ga-pu:pu-beta_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1 | 0 | 1 |
| [GAMMA_PU](#phase-ga-pu-pu-gamma); _phase:ga-pu:pu-gamma_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 487.9–732.9 K, x(Pu) 1–1 | 0 | 1 |

## ORTHORHOMBIC_A11 (Ga–Pu)

- Id: `phase:ga-pu: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 1 of 1 calculated diagram(s): 300–302.91 K, x(Pu) 0–0
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:a11-orthorhombic)

Names (2): _corpus: _corpus:phase:ga-pu:a11-orthorhombic  
_tdb: _tdb:GaPu-04Tur.tdb:ORTHORHOMBIC_A11  


### TDB models of ORTHORHOMBIC_A11 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): ORTHORHOMBIC_A11, type code %, sha256 `bdabd8b0c19a4ee0…`

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

## TETRAGONAL_A6 (Ga–Pu)

- Id: `phase:ga-pu:a6-tetragonal`; status `assigned`
- Structure: In · A6 · tI2 · I4/mmm (139); type `st:a6-in-ti2`; tier A: standard phase name; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 730.57–755.57 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:a6-tetragonal)

Names (2): _corpus: _corpus:phase:ga-pu:a6-tetragonal  
_tdb: _tdb:GaPu-04Tur.tdb:TETRAGONAL_A6  


### TDB models of TETRAGONAL_A6 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): TETRAGONAL_A6, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
46: PHASE TETRAGONAL_A6 % 1 1 !
47: CONST TETRAGONAL_A6 : GA PU% : !
~~~~

## BCC_A2 (Ga–Pu)

- Id: `phase:ga-pu: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 1 of 1 calculated diagram(s): 754.92–988.91 K, x(Pu) 0.89601–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:bcc-a2)

Names (2): _corpus: _corpus:phase:ga-pu:bcc-a2  
_tdb: _tdb:GaPu-04Tur.tdb:BCC_A2  


### TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): BCC_A2, type code %B, sha256 `bdabd8b0c19a4ee0…`

~~~~text
36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : GA PU% : VA : !
~~~~

## FCC_A1 (Ga–Pu)

- Id: `phase:ga-pu: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 1 of 1 calculated diagram(s): 330.59–921.99 K, x(Pu) 0.85636–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:fcc-a1)

Names (2): _corpus: _corpus:phase:ga-pu:fcc-a1  
_tdb: _tdb:GaPu-04Tur.tdb:FCC_A1  


### TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): FCC_A1, type code %A, sha256 `bdabd8b0c19a4ee0…`

~~~~text
31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : GA PU% : VA : !
~~~~

## GA11PU3 (Ga–Pu)

- Id: `phase:ga-pu:ga11pu3`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Ga11Pu3) — Hallstedt 2025 mmc2 row for GA11PU3: Ga11Pu3
- Stoichiometry: Ga 0.7857, Pu 0.2143
- Stability: stable in 1 of 1 calculated diagram(s): 300–666.88 K, x(Pu) 0.21429–0.21429
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga11pu3)

Names (2): _corpus: _corpus:phase:ga-pu:ga11pu3  
_tdb: _tdb:GaPu-04Tur.tdb:GA11PU3  


### TDB models of GA11PU3 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA11PU3, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
86: PHASE GA11PU3 % 2 11 3 !
87: CONST GA11PU3 : GA : PU : !
~~~~

## GA15PU2 (Ga–Pu)

- Id: `phase:ga-pu:ga15pu2`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Ga15Pu2) — Hallstedt 2025 mmc2 row for GA15PU2: Ga15Pu2
- Stoichiometry: Ga 0.8824, Pu 0.1176
- Stability: stable in 1 of 1 calculated diagram(s): 300–347.03 K, x(Pu) 0.11765–0.11765
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga15pu2)

Names (2): _corpus: _corpus:phase:ga-pu:ga15pu2  
_tdb: _tdb:GaPu-04Tur.tdb:GA15PU2  


### TDB models of GA15PU2 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA15PU2, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
71: PHASE GA15PU2 % 2 15 2 !
72: CONST GA15PU2 : GA : PU : !
~~~~

## GA2PU_C32 (Ga–Pu)

- Id: `phase:ga-pu:ga2pu-c32`; status `assigned`
- Structure: AlB2 · C32 · hP3 · P6/mmm (191); type `st:c32-alb2-hp3`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.6667, Pu 0.3333
- Stability: stable in 1 of 1 calculated diagram(s): 300–1534.88 K, x(Pu) 0.33333–0.33333
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga2pu-c32)

Names (2): _corpus: _corpus:phase:ga-pu:ga2pu-c32  
_tdb: _tdb:GaPu-04Tur.tdb:GA2PU_C32  


### TDB models of GA2PU_C32 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA2PU_C32, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
111: PHASE GA2PU_C32 % 2 2 1 !
112: CONST GA2PU_C32 : GA : PU : !
~~~~

## GA3PU_D019 (Ga–Pu)

- Id: `phase:ga-pu:ga3pu-d019`; status `assigned`
- Structure: Ni3Sn · D0_19 · hP8 · P6_3/mmc (194); type `st:d0-19-ni3sn-hp8`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.7500, Pu 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 500–1196.16 K, x(Pu) 0.25–0.25
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga3pu-d019)

Names (2): _corpus: _corpus:phase:ga-pu:ga3pu-d019  
_tdb: _tdb:GaPu-04Tur.tdb:GA3PU_D019  


### TDB models of GA3PU_D019 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA3PU_D019, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
101: PHASE GA3PU_D019 % 2 3 1 !
102: CONST GA3PU_D019 : GA : PU : !
~~~~

## GA3PU_HT (Ga–Pu)

- Id: `phase:ga-pu:ga3pu-ht`; status `needs_review`
- No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition; sgte_mmc2_row_incomplete
- Candidate (dft_mp): R-3m (166) — on-hull MP PuGa3 at x(PU)=0.2500
- Candidate (dft_oqmd): R-3m (166) — on-hull OQMD Ga3 Pu1 at x(PU)=0.2500
- Candidate (sgte_mmc2): (Ga3Pu-ht) — Hallstedt 2025 mmc2 row for GA3PU_HT: Ga3Pu (HT)
- Stoichiometry: Ga 0.7500, Pu 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 1196.16–1357.74 K, x(Pu) 0.25–0.25
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga3pu-ht)

Names (2): _corpus: _corpus:phase:ga-pu:ga3pu-ht  
_tdb: _tdb:GaPu-04Tur.tdb:GA3PU_HT  


### TDB models of GA3PU_HT (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA3PU_HT, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
106: PHASE GA3PU_HT % 2 3 1 !
107: CONST GA3PU_HT : GA : PU : !
~~~~

## GA3PU_LT (Ga–Pu)

- Id: `phase:ga-pu:ga3pu-lt`; status `assigned`
- Structure: InMg3 · hR16 · R-3m (166); type `st:inmg3-hr16`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ga 0.7500, Pu 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 300–500 K, x(Pu) 0.25–0.25
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga3pu-lt)

Names (2): _corpus: _corpus:phase:ga-pu:ga3pu-lt  
_tdb: _tdb:GaPu-04Tur.tdb:GA3PU_LT  


### TDB models of GA3PU_LT (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA3PU_LT, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
96: PHASE GA3PU_LT % 2 3 1 !
97: CONST GA3PU_LT : GA : PU : !
~~~~

## GA3PU2 (Ga–Pu)

- Id: `phase:ga-pu:ga3pu2`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Ga3Pu2) — Hallstedt 2025 mmc2 row for GA3PU2: Ga3Pu2
- Stoichiometry: Ga 0.6000, Pu 0.4000
- Stability: stable in 1 of 1 calculated diagram(s): 300–993.92 K, x(Pu) 0.4–0.4
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga3pu2)

Names (2): _corpus: _corpus:phase:ga-pu:ga3pu2  
_tdb: _tdb:GaPu-04Tur.tdb:GA3PU2  


### TDB models of GA3PU2 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA3PU2, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
116: PHASE GA3PU2 % 2 3 2 !
117: CONST GA3PU2 : GA : PU : !
~~~~

## GA3PU5_D8M (Ga–Pu)

- Id: `phase:ga-pu:ga3pu5-d8m`; status `assigned`
- Structure: W5Si3 · D8_m · tI32 · I4/mcm (140); type `st:d8-m-w5si3-ti32`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.3750, Pu 0.6250
- Stability: stable in 1 of 1 calculated diagram(s): 300–1037.14 K, x(Pu) 0.625–0.625
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga3pu5-d8m)

Names (2): _corpus: _corpus:phase:ga-pu:ga3pu5-d8m  
_tdb: _tdb:GaPu-04Tur.tdb:GA3PU5_D8M  


### TDB models of GA3PU5_D8M (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA3PU5_D8M, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
131: PHASE GA3PU5_D8M % 2 3 5 !
132: CONST GA3PU5_D8M : GA : PU : !
~~~~

## GA4PU_D1B (Ga–Pu)

- Id: `phase:ga-pu:ga4pu-d1b`; status `assigned`
- Structure: Al4U · D1_b · oI20 · Imma (74); type `st:d1-b-al4u-oi20`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaabdasb and oqmd-17293, space group 74
- Stoichiometry: Ga 0.8000, Pu 0.2000
- Stability: stable in 1 of 1 calculated diagram(s): 300–745.07 K, x(Pu) 0.2–0.2
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga4pu-d1b)

Names (4): _corpus: _corpus:phase:ga-pu:ga4pu-d1b  
_mp: _mp:mp-aaabdasb  
_oqmd: _oqmd:oqmd-17293  
_tdb: _tdb:GaPu-04Tur.tdb:GA4PU_D1B  


### TDB models of GA4PU_D1B (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA4PU_D1B, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
81: PHASE GA4PU_D1B % 2 4 1 !
82: CONST GA4PU_D1B : GA : PU : !
~~~~

## GA6PU (Ga–Pu)

- Id: `phase:ga-pu:ga6pu`; status `assigned`
- Structure: Ga6Pu · tP14 · P4/nbm (125); type `st:ga6pu-tp14`; 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 0.8571, Pu 0.1429
- Stability: stable in 1 of 1 calculated diagram(s): 300–588.63 K, x(Pu) 0.14286–0.14286
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga6pu)

Names (2): _corpus: _corpus:phase:ga-pu:ga6pu  
_tdb: _tdb:GaPu-04Tur.tdb:GA6PU  


### TDB models of GA6PU (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA6PU, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
76: PHASE GA6PU % 2 6 1 !
77: CONST GA6PU : GA : PU : !
~~~~

## GA7PU2 (Ga–Pu)

- Id: `phase:ga-pu:ga7pu2`; status `needs_review`
- No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
- Candidate (sgte_mmc2): (Ga7Pu2) — Hallstedt 2025 mmc2 row for GA7PU2: Ga7Pu2
- Stoichiometry: Ga 0.7778, Pu 0.2222
- Stability: stable in 1 of 1 calculated diagram(s): 300–502.84 K, x(Pu) 0.22222–0.22222
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:ga7pu2)

Names (2): _corpus: _corpus:phase:ga-pu:ga7pu2  
_tdb: _tdb:GaPu-04Tur.tdb:GA7PU2  


### TDB models of GA7PU2 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GA7PU2, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
91: PHASE GA7PU2 % 2 7 2 !
92: CONST GA7PU2 : GA : PU : !
~~~~

## GAPU_HT (Ga–Pu)

- Id: `phase:ga-pu:gapu-ht`; status `assigned`
- Structure: GaPu · tI16 · I4/mmm (139); type `st:gapu-ti16-2`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ga 0.5000, Pu 0.5000
- Stability: stable in 1 of 1 calculated diagram(s): 840.93–1273.28 K, x(Pu) 0.5–0.5
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:gapu-ht)

Names (2): _corpus: _corpus:phase:ga-pu:gapu-ht  
_tdb: _tdb:GaPu-04Tur.tdb:GAPU_HT  


### TDB models of GAPU_HT (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAPU_HT, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
126: PHASE GAPU_HT % 2 1 1 !
127: CONST GAPU_HT : GA : PU : !
~~~~

## GAPU_LT (Ga–Pu)

- Id: `phase:ga-pu:gapu-lt`; status `assigned`
- Structure: GaPu · tI16 · I4mm (107); type `st:gapu-ti16`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ga 0.5000, Pu 0.5000
- Stability: stable in 1 of 1 calculated diagram(s): 300–840.93 K, x(Pu) 0.5–0.5
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:gapu-lt)

Names (2): _corpus: _corpus:phase:ga-pu:gapu-lt  
_tdb: _tdb:GaPu-04Tur.tdb:GAPU_LT  


### TDB models of GAPU_LT (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAPU_LT, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
121: PHASE GAPU_LT % 2 1 1 !
122: CONST GAPU_LT : GA : PU : !
~~~~

## GAPU2_ETA (Ga–Pu)

- Id: `phase:ga-pu:gapu2-eta`; status `assigned`
- Structure: CoU · B_a · cI16 · I2_13 (199); type `st:b-a-cou-ci16`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
- Stability: stable in 1 of 1 calculated diagram(s): 939.61–1198.49 K, x(Pu) 0.58349–0.77278
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:gapu2-eta)

Names (2): _corpus: _corpus:phase:ga-pu:gapu2-eta  
_tdb: _tdb:GaPu-04Tur.tdb:GAPU2_ETA  


### TDB models of GAPU2_ETA (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAPU2_ETA, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
136: PHASE GAPU2_ETA % 1 1 !
137: CONST GAPU2_ETA : GA PU : !
~~~~

## GAPU3_LT (Ga–Pu)

- Id: `phase:ga-pu:gapu3`; status `assigned`
- Structure: Pb3Sr · tP4 · P4/mmm (123); type `st:pb3sr-tp4`; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
- Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) [doi:10.1016/j.calphad.2025.102833](https://doi.org/10.1016/j.calphad.2025.102833)
- Caveat: not certain from the name or DFT alone (no_structure_token, polymorph_family:other phases of this system have the same composition); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ga 0.2500, Pu 0.7500
- Stability: stable in 1 of 1 calculated diagram(s): 300–636 K, x(Pu) 0.75–0.75
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:gapu3)

Names (2): _corpus: _corpus:phase:ga-pu:gapu3  
_tdb: _tdb:GaPu-04Tur.tdb:GAPU3_LT  


### TDB models of GAPU3_LT (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAPU3_LT, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
141: PHASE GAPU3_LT % 2 1 3 !
142: CONST GAPU3_LT : GA : PU : !
~~~~

## GAPU3_L12 (Ga–Pu)

- Id: `phase:ga-pu:gapu3-l12`; status `assigned`
- Structure: AuCu3 · L1_2 · cP4 · Pm-3m (221); type `st:l1-2-aucu3-cp4`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 0.2500, Pu 0.7500
- Stability: stable in 1 of 1 calculated diagram(s): 636–941.57 K, x(Pu) 0.75–0.75
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:gapu3-l12)

Names (2): _corpus: _corpus:phase:ga-pu:gapu3-l12  
_tdb: _tdb:GaPu-04Tur.tdb:GAPU3_L12  


### TDB models of GAPU3_L12 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAPU3_L12, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
146: PHASE GAPU3_L12 % 2 1 3 !
147: CONST GAPU3_L12 : GA : PU : !
~~~~

## HCP_A3 (Ga–Pu)

- Id: `phase:ga-pu:hcp-a3`; status `assigned`
- Structure: Mg · A3 · hP2 · P6_3/mmc (194); type `st:a3-mg-hp2`; tier A: standard phase name; confidence high
- Stoichiometry: Ga 1.0000
- Stability: not stable in 1 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:hcp-a3)

Names (2): _corpus: _corpus:phase:ga-pu:hcp-a3  
_tdb: _tdb:GaPu-04Tur.tdb:HCP_A3  


### TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): HCP_A3, type code %A, sha256 `bdabd8b0c19a4ee0…`

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

## LIQUID (Ga–Pu)

- Id: `phase:ga-pu:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 1 of 1 calculated diagram(s): 302.91–4000 K, x(Pu) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:liquid)

Names (2): _corpus: _corpus:phase:ga-pu:liquid  
_tdb: _tdb:GaPu-04Tur.tdb:LIQUID  


### TDB models of LIQUID (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): LIQUID, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : GA PU : !
~~~~

## ALPHA_PU (Ga–Pu)

- Id: `phase:ga-pu:pu-alpha`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (sgte_mmc2): alpha-Pu · mP16 · P2_1/m (11) — Hallstedt 2025 mmc2 row for ALPHA_PU: Pu (alpha)
- Candidate (tdb_comment): alpha-Pu · mP16 · P2_1/m — GaPu-04Tur.tdb: 'Prototype alpha-Pu (mP16, P2_1/m)'
- Stability: stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:pu-alpha)

Names (2): _corpus: _corpus:phase:ga-pu:pu-alpha  
_tdb: _tdb:GaPu-04Tur.tdb:ALPHA_PU  


### TDB models of ALPHA_PU (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): ALPHA_PU, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
56: PHASE ALPHA_PU % 1 1 !
57: CONST ALPHA_PU : GA PU% : !
~~~~

## BETA_PU (Ga–Pu)

- Id: `phase:ga-pu:pu-beta`; status `needs_review`
- No structure assigned. Why: no_structure_token; unary_composition
- Candidate (sgte_mmc2): beta-Pu · mC34 · C2/m (12) — Hallstedt 2025 mmc2 row for BETA_PU: Pu (beta)
- Candidate (tdb_comment): beta-Pu · mC34 · C2/m — GaPu-04Tur.tdb: 'Prototype beta-Pu (mC34, C2/m)'
- Stoichiometry: Pu 1.0000
- Stability: stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:pu-beta)

Names (2): _corpus: _corpus:phase:ga-pu:pu-beta  
_tdb: _tdb:GaPu-04Tur.tdb:BETA_PU  


### TDB models of BETA_PU (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): BETA_PU, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
61: PHASE BETA_PU % 1 1 !
62: CONST BETA_PU : PU : !
~~~~

## GAMMA_PU (Ga–Pu)

- Id: `phase:ga-pu:pu-gamma`; status `needs_review`
- No structure assigned. Why: no_structure_token; off_stoichiometric_model
- Candidate (sgte_mmc2): gamma-Pu · oF8 · Fddd (70) — Hallstedt 2025 mmc2 row for GAMMA_PU: Hg4In, Pu (gamma)
- Candidate (tdb_comment): gamma-Pu · oF8 · Fddd — GaPu-04Tur.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
- Stability: stable in 1 of 1 calculated diagram(s): 487.9–732.9 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ga-pu:pu-gamma)

Names (2): _corpus: _corpus:phase:ga-pu:pu-gamma  
_tdb: _tdb:GaPu-04Tur.tdb:GAMMA_PU  


### TDB models of GAMMA_PU (1): PHASE and CONSTITUENT statements as written

[GaPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/GaPu-04Tur.tdb): GAMMA_PU, type code %, sha256 `bdabd8b0c19a4ee0…`

~~~~text
66: PHASE GAMMA_PU % 1 1 !
67: CONST GAMMA_PU : GA PU% : !
~~~~

## 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).