# Al–Pu phases

> Al–Pu system: 17 phases (tier A 8, tier C 1, liquid 1, needs_review 7); 16 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

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

17 phases (tier A 8, tier C 1, liquid 1, needs_review 7); 16 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

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

Table: Phases of the Al–Pu system (17)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [TETRAGONAL_A6](#phase-al-pu-a6-tetragonal); _phase:al-pu:a6-tetragonal_ | In · A6 · tI2 · I4/mmm (139) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 600.31–1320.51 K, x(Pu) 1–1 | 0 | 3 |
| [AL2PU_C15](#phase-al-pu-al2pu-c15); _phase:al-pu:al2pu-c15_ | Cu2Mg · C15 · cF24 · Fd-3m (227) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1957.35 K, x(Pu) 0.33333–0.33333 | 0 | 3 |
| [AL3PU_6H](#phase-al-pu-al3pu-6h); _phase:al-pu:al3pu-6h_ |  | needs_review | stable in 3 of 3 calculated diagram(s): 1299.99–1500.02 K, x(Pu) 0.25–0.25 | 0 | 3 |
| [AL3PU_9H](#phase-al-pu-al3pu-9h); _phase:al-pu:al3pu-9h_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–1299.99 K, x(Pu) 0.25–0.25 | 0 | 1 |
| [AL3PU_9HA](#phase-al-pu-al3pu-9ha); _phase:al-pu:al3pu-9ha_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 300–1200 K, x(Pu) 0.25–0.25 | 0 | 2 |
| [AL3PU_9HB](#phase-al-pu-al3pu-9hb); _phase:al-pu:al3pu-9hb_ |  | needs_review | stable in 2 of 2 calculated diagram(s): 1200–1300 K, x(Pu) 0.25–0.25 | 0 | 2 |
| [AL3PU_L12](#phase-al-pu-al3pu-l12); _phase:al-pu:al3pu-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 1450–1718.42 K, x(Pu) 0.25–0.25 | 0 | 3 |
| [AL4PU_D1B](#phase-al-pu-al4pu-d1b); _phase:al-pu:al4pu-d1b_ | Al4U · D1_b · oI20 · Imma (74) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1222.13 K, x(Pu) 0.2–0.2 | 0 | 3 |
| [ALPU_A12](#phase-al-pu-alpu-a12); _phase:al-pu:alpu-a12_ | alpha-Mn · A12 · cI58 · I-43m (217) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1063.24 K, x(Pu) 0.5–0.5 | 0 | 3 |
| [ALPU3](#phase-al-pu-alpu3); _phase:al-pu:alpu3_ | Pb3Sr · tP4 · P4/mmm (123) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 3 of 3 calculated diagram(s): 300–1100 K, x(Pu) 0.75–0.75 | 0 | 3 |
| [BCC_A2](#phase-al-pu-bcc-a2); _phase:al-pu:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 754.9–1320.51 K, x(Pu) 0.84401–1 | 0 | 3 |
| [FCC_A1](#phase-al-pu-fcc-a1); _phase:al-pu:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 3 of 3 calculated diagram(s): 300–1060.75 K, x(Pu) 0–1 | 0 | 3 |
| [HCP_A3](#phase-al-pu-hcp-a3); _phase:al-pu:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 3 calculated diagram(s) | 0 | 3 |
| [LIQUID](#phase-al-pu-liquid); _phase:al-pu:liquid_ | liquid | liquid | stable in 3 of 3 calculated diagram(s): 778–4000 K, x(Pu) 0–1 | 0 | 3 |
| [ALPHA_PU](#phase-al-pu-pu-alpha); _phase:al-pu:pu-alpha_ |  | needs_review | stable in 3 of 3 calculated diagram(s): 300–397.62 K, x(Pu) 1–1 | 0 | 3 |
| [BETA_PU](#phase-al-pu-pu-beta); _phase:al-pu:pu-beta_ |  | needs_review | stable in 3 of 3 calculated diagram(s): 397.62–592.9 K, x(Pu) 1–1 | 0 | 3 |
| [GAMMA_PU](#phase-al-pu-pu-gamma); _phase:al-pu:pu-gamma_ |  | needs_review | stable in 3 of 3 calculated diagram(s): 487.9–732.9 K, x(Pu) 1–1 | 0 | 3 |

## TETRAGONAL_A6 (Al–Pu)

- Id: `phase:al-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 3 of 3 calculated diagram(s): 600.31–1320.51 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:a6-tetragonal)

Names (4): _corpus: _corpus:phase:al-pu:a6-tetragonal  
_tdb: _tdb:AlPu-04Tur.tdb:TETRAGONAL_A6, tdb:AlPu-10Sed.tdb:TETRAGONAL_A6, tdb:AlPu-16Per.tdb:TETRAGONAL_A6  


### TDB models of TETRAGONAL_A6 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): TETRAGONAL_A6, type code %, sha256 `e467c364f317d002…`

~~~~text
45: PHASE TETRAGONAL_A6 % 1 1 !
46: CONST TETRAGONAL_A6 : AL PU% : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): TETRAGONAL_A6, type code %, sha256 `52307f110aa139d0…`

~~~~text
52: PHASE TETRAGONAL_A6 % 1 1 !
53: CONST TETRAGONAL_A6 : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): TETRAGONAL_A6, type code %, sha256 `782e1c2991439aa8…`

~~~~text
50: PHASE TETRAGONAL_A6 % 1 1 !
51: CONST TETRAGONAL_A6 : AL PU% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL2PU_C15 (Al–Pu)

- Id: `phase:al-pu:al2pu-c15`; status `assigned`
- Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type `st:c15-cu2mg-cf24`; tier A: standard phase name; confidence high
- Caveat: DFT agrees: on-hull mp-aaaabfrs and oqmd-10568, space group 227
- Stoichiometry: Al 0.6667, Pu 0.3333
- Stability: stable in 3 of 3 calculated diagram(s): 300–1957.35 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:al-pu:al2pu-c15)

Names (6): _corpus: _corpus:phase:al-pu:al2pu-c15  
_mp: _mp:mp-aaaabfrs  
_oqmd: _oqmd:oqmd-10568  
_tdb: _tdb:AlPu-04Tur.tdb:AL2PU_C15, tdb:AlPu-10Sed.tdb:AL2PU_C15, tdb:AlPu-16Per.tdb:AL2PU_C15  


### TDB models of AL2PU_C15 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL2PU_C15, type code %, sha256 `e467c364f317d002…`

~~~~text
90: PHASE AL2PU_C15 % 2 2 1 !
91: CONST AL2PU_C15 : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): AL2PU_C15, type code %, sha256 `52307f110aa139d0…`

~~~~text
92: PHASE AL2PU_C15 % 2 2 1 !
93: CONST AL2PU_C15 : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL2PU_C15, type code %, sha256 `782e1c2991439aa8…`

~~~~text
95: PHASE AL2PU_C15 % 2 2 1 !
96: CONST AL2PU_C15 : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL3PU_6H (Al–Pu)

- Id: `phase:al-pu:al3pu-6h`; status `needs_review`
- No structure assigned. Why: name_has_descriptive_tokens:6H; no_structure_token
- Candidate (dft_mp): R-3m (166) — on-hull MP PuAl3 at x(PU)=0.2500
- Candidate (sgte_mmc2): Al3Pu · hP24 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for AL3PU_6H: Al3Pu-6H (ht2)
- Candidate (tdb_comment): Al3Pu · hP24 · P6_3/mmc — AlPu-04Tur.tdb: 'Prototype Al3Pu (hP24, P6_3/mmc), ht2'
- Candidate (tdb_comment): Al3Pu · hP24 · P6_3/mmc — AlPu-10Sed.tdb: 'Prototype Al3Pu (hP24, P6_3/mmc), ht2'
- Candidate (tdb_comment): Al3Pu · hP24 · P6_3/mmc — AlPu-16Per.tdb: 'Prototype Al3Pu (hP24, P6_3/mmc), ht2'
- Stoichiometry: Al 0.7500, Pu 0.2500
- Stability: stable in 3 of 3 calculated diagram(s): 1299.99–1500.02 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:al-pu:al3pu-6h)

Names (4): _corpus: _corpus:phase:al-pu:al3pu-6h  
_tdb: _tdb:AlPu-04Tur.tdb:AL3PU_6H, tdb:AlPu-10Sed.tdb:AL3PU_6H, tdb:AlPu-16Per.tdb:AL3PU_6H  


### TDB models of AL3PU_6H (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL3PU_6H, type code %, sha256 `e467c364f317d002…`

~~~~text
80: PHASE AL3PU_6H % 2 3 1 !
81: CONST AL3PU_6H : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): AL3PU_6H, type code %, sha256 `52307f110aa139d0…`

~~~~text
82: PHASE AL3PU_6H % 2 3 1 !
83: CONST AL3PU_6H : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL3PU_6H, type code %, sha256 `782e1c2991439aa8…`

~~~~text
85: PHASE AL3PU_6H % 2 3 1 !
86: CONST AL3PU_6H : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL3PU_9H (Al–Pu)

- Id: `phase:al-pu:al3pu-9h`; status `needs_review`
- No structure assigned. Why: name_has_descriptive_tokens:9H; no_structure_token
- Candidate (dft_mp): R-3m (166) — on-hull MP PuAl3 at x(PU)=0.2500
- Candidate (sgte_mmc2): BaPb3 · hR12 · R-3m (166) — Hallstedt 2025 mmc2 row for AL3PU_9H: Al3Pu-9H (rt)
- Candidate (tdb_comment): BaPb3 · hR12 · R-3m — AlPu-10Sed.tdb: 'Prototype BaPb3 (hR12, R-3m), rt'
- Stoichiometry: Al 0.7500, Pu 0.2500
- Stability: stable in 1 of 1 calculated diagram(s): 300–1299.99 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:al-pu:al3pu-9h)

Names (2): _corpus: _corpus:phase:al-pu:al3pu-9h  
_tdb: _tdb:AlPu-10Sed.tdb:AL3PU_9H  


### TDB models of AL3PU_9H (1): PHASE and CONSTITUENT statements as written

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): AL3PU_9H, type code %, sha256 `52307f110aa139d0…`

~~~~text
77: PHASE AL3PU_9H % 2 3 1 !
78: CONST AL3PU_9H : AL : PU : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_

## AL3PU_9HA (Al–Pu)

- Id: `phase:al-pu:al3pu-9ha`; status `needs_review`
- No structure assigned. Why: name_has_descriptive_tokens:9HA; no_structure_token
- Candidate (dft_mp): R-3m (166) — on-hull MP PuAl3 at x(PU)=0.2500
- Candidate (sgte_mmc2): BaPb3 · hR12 · R-3m (166) — Hallstedt 2025 mmc2 row for AL3PU_9HA: Al3Pu-9H (rt)
- Candidate (tdb_comment): BaPb3 · hR12 · R-3m — AlPu-04Tur.tdb: 'Prototype BaPb3 (hR12, R-3m), rt'
- Candidate (tdb_comment): BaPb3 · hR12 · R-3m — AlPu-16Per.tdb: 'Prototype BaPb3 (hR12, R-3m), rt'
- Stoichiometry: Al 0.7500, Pu 0.2500
- Stability: stable in 2 of 2 calculated diagram(s): 300–1200 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:al-pu:al3pu-9ha)

Names (3): _corpus: _corpus:phase:al-pu:al3pu-9ha  
_tdb: _tdb:AlPu-04Tur.tdb:AL3PU_9HA, tdb:AlPu-16Per.tdb:AL3PU_9HA  


### TDB models of AL3PU_9HA (2): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL3PU_9HA, type code %, sha256 `e467c364f317d002…`

~~~~text
70: PHASE AL3PU_9HA % 2 3 1 !
71: CONST AL3PU_9HA : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL3PU_9HA, type code %, sha256 `782e1c2991439aa8…`

~~~~text
75: PHASE AL3PU_9HA % 2 3 1 !
76: CONST AL3PU_9HA : AL : PU : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL3PU_9HB (Al–Pu)

- Id: `phase:al-pu:al3pu-9hb`; status `needs_review`
- No structure assigned. Why: name_has_descriptive_tokens:9HB; no_structure_token
- Candidate (dft_mp): R-3m (166) — on-hull MP PuAl3 at x(PU)=0.2500
- Candidate (sgte_mmc2): BaPb3 · hR12 · R-3m (166) — Hallstedt 2025 mmc2 row for AL3PU_9HB: Al3Pu-9H (ht1)
- Candidate (tdb_comment): BaPb3 · hR12 · R-3m — AlPu-04Tur.tdb: 'Prototype BaPb3 (hR12, R-3m), ht1'
- Candidate (tdb_comment): BaPb3 · hR12 · R-3m — AlPu-16Per.tdb: 'Prototype BaPb3 (hR12, R-3m), ht1'
- Stoichiometry: Al 0.7500, Pu 0.2500
- Stability: stable in 2 of 2 calculated diagram(s): 1200–1300 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:al-pu:al3pu-9hb)

Names (3): _corpus: _corpus:phase:al-pu:al3pu-9hb  
_tdb: _tdb:AlPu-04Tur.tdb:AL3PU_9HB, tdb:AlPu-16Per.tdb:AL3PU_9HB  


### TDB models of AL3PU_9HB (2): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL3PU_9HB, type code %, sha256 `e467c364f317d002…`

~~~~text
75: PHASE AL3PU_9HB % 2 3 1 !
76: CONST AL3PU_9HB : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL3PU_9HB, type code %, sha256 `782e1c2991439aa8…`

~~~~text
80: PHASE AL3PU_9HB % 2 3 1 !
81: CONST AL3PU_9HB : AL : PU : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL3PU_L12 (Al–Pu)

- Id: `phase:al-pu:al3pu-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: Al 0.7500, Pu 0.2500
- Stability: stable in 3 of 3 calculated diagram(s): 1450–1718.42 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:al-pu:al3pu-l12)

Names (4): _corpus: _corpus:phase:al-pu:al3pu-l12  
_tdb: _tdb:AlPu-04Tur.tdb:AL3PU_L12, tdb:AlPu-10Sed.tdb:AL3PU_L12, tdb:AlPu-16Per.tdb:AL3PU_L12  


### TDB models of AL3PU_L12 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL3PU_L12, type code %, sha256 `e467c364f317d002…`

~~~~text
85: PHASE AL3PU_L12 % 2 3 1 !
86: CONST AL3PU_L12 : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): AL3PU_L12, type code %, sha256 `52307f110aa139d0…`

~~~~text
87: PHASE AL3PU_L12 % 2 3 1 !
88: CONST AL3PU_L12 : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL3PU_L12, type code %, sha256 `782e1c2991439aa8…`

~~~~text
90: PHASE AL3PU_L12 % 2 3 1 !
91: CONST AL3PU_L12 : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## AL4PU_D1B (Al–Pu)

- Id: `phase:al-pu:al4pu-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-aaabewya and oqmd-10572, space group 74
- Stoichiometry: Al 0.8000, Pu 0.2000
- Stability: stable in 3 of 3 calculated diagram(s): 300–1222.13 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:al-pu:al4pu-d1b)

Names (6): _corpus: _corpus:phase:al-pu:al4pu-d1b  
_mp: _mp:mp-aaabewya  
_oqmd: _oqmd:oqmd-10572  
_tdb: _tdb:AlPu-04Tur.tdb:AL4PU_D1B, tdb:AlPu-10Sed.tdb:AL4PU_D1B, tdb:AlPu-16Per.tdb:AL4PU_D1B  


### TDB models of AL4PU_D1B (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): AL4PU_D1B, type code %, sha256 `e467c364f317d002…`

~~~~text
65: PHASE AL4PU_D1B % 2 4 1 !
66: CONST AL4PU_D1B : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): AL4PU_D1B, type code %, sha256 `52307f110aa139d0…`

~~~~text
72: PHASE AL4PU_D1B % 2 4 1 !
73: CONST AL4PU_D1B : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): AL4PU_D1B, type code %, sha256 `782e1c2991439aa8…`

~~~~text
70: PHASE AL4PU_D1B % 2 4 1 !
71: CONST AL4PU_D1B : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## ALPU_A12 (Al–Pu)

- Id: `phase:al-pu:alpu-a12`; status `assigned`
- Structure: alpha-Mn · A12 · cI58 · I-43m (217); type `st:a12-alpha-mn-ci58`; tier A: standard phase name; confidence high
- Stoichiometry: Al 0.5000, Pu 0.5000
- Stability: stable in 3 of 3 calculated diagram(s): 300–1063.24 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:al-pu:alpu-a12)

Names (4): _corpus: _corpus:phase:al-pu:alpu-a12  
_tdb: _tdb:AlPu-04Tur.tdb:ALPU_A12, tdb:AlPu-10Sed.tdb:ALPU_A12, tdb:AlPu-16Per.tdb:ALPU_A12  


### TDB models of ALPU_A12 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): ALPU_A12, type code %, sha256 `e467c364f317d002…`

~~~~text
95: PHASE ALPU_A12 % 2 1 1 !
96: CONST ALPU_A12 : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): ALPU_A12, type code %, sha256 `52307f110aa139d0…`

~~~~text
97: PHASE ALPU_A12 % 2 1 1 !
98: CONST ALPU_A12 : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): ALPU_A12, type code %, sha256 `782e1c2991439aa8…`

~~~~text
100: PHASE ALPU_A12 % 2 1 1 !
101: CONST ALPU_A12 : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## ALPU3 (Al–Pu)

- Id: `phase:al-pu:alpu3`; 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_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Al 0.2500, Pu 0.7500
- Stability: stable in 3 of 3 calculated diagram(s): 300–1100 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:al-pu:alpu3)

Names (4): _corpus: _corpus:phase:al-pu:alpu3  
_tdb: _tdb:AlPu-04Tur.tdb:ALPU3, tdb:AlPu-10Sed.tdb:ALPU3, tdb:AlPu-16Per.tdb:ALPU3  


### TDB models of ALPU3 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): ALPU3, type code %, sha256 `e467c364f317d002…`

~~~~text
100: PHASE ALPU3 % 2 1 3 !
101: CONST ALPU3 : AL : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): ALPU3, type code %, sha256 `52307f110aa139d0…`

~~~~text
102: PHASE ALPU3 % 2 1 3 !
103: CONST ALPU3 : AL : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): ALPU3, type code %, sha256 `782e1c2991439aa8…`

~~~~text
105: PHASE ALPU3 % 2 1 3 !
106: CONST ALPU3 : AL : PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## BCC_A2 (Al–Pu)

- Id: `phase:al-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 3 of 3 calculated diagram(s): 754.9–1320.51 K, x(Pu) 0.84401–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:bcc-a2)

Names (4): _corpus: _corpus:phase:al-pu:bcc-a2  
_tdb: _tdb:AlPu-04Tur.tdb:BCC_A2, tdb:AlPu-10Sed.tdb:BCC_A2, tdb:AlPu-16Per.tdb:BCC_A2  


### TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): BCC_A2, type code %B, sha256 `e467c364f317d002…`

~~~~text
35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : AL PU% : VA : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): BCC_A2, type code %B, sha256 `52307f110aa139d0…`

~~~~text
42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : AL PU% : VA : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): BCC_A2, type code %B, sha256 `782e1c2991439aa8…`

~~~~text
40: PHASE BCC_A2 %B 2 1 3 !
41: CONST BCC_A2 : AL PU% : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## FCC_A1 (Al–Pu)

- Id: `phase:al-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 3 of 3 calculated diagram(s): 300–1060.75 K, x(Pu) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:fcc-a1)

Names (4): _corpus: _corpus:phase:al-pu:fcc-a1  
_tdb: _tdb:AlPu-04Tur.tdb:FCC_A1, tdb:AlPu-10Sed.tdb:FCC_A1, tdb:AlPu-16Per.tdb:FCC_A1  


### TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): FCC_A1, type code %A, sha256 `e467c364f317d002…`

~~~~text
30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : AL% PU% : VA : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): FCC_A1, type code %A, sha256 `52307f110aa139d0…`

~~~~text
37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : AL% ALPU3 PU : VA : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): FCC_A1, type code %A, sha256 `782e1c2991439aa8…`

~~~~text
35: PHASE FCC_A1 %A 2 1 1 !
36: CONST FCC_A1 : AL% PU% : VA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## HCP_A3 (Al–Pu)

- Id: `phase:al-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: Al 1.0000
- Stability: not stable in 3 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:hcp-a3)

Names (4): _corpus: _corpus:phase:al-pu:hcp-a3  
_tdb: _tdb:AlPu-04Tur.tdb:HCP_A3, tdb:AlPu-10Sed.tdb:HCP_A3, tdb:AlPu-16Per.tdb:HCP_A3  


### TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): HCP_A3, type code %A, sha256 `e467c364f317d002…`

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

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): HCP_A3, type code %A, sha256 `52307f110aa139d0…`

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

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): HCP_A3, type code %A, sha256 `782e1c2991439aa8…`

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

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## LIQUID (Al–Pu)

- Id: `phase:al-pu:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 3 of 3 calculated diagram(s): 778–4000 K, x(Pu) 0–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:liquid)

Names (4): _corpus: _corpus:phase:al-pu:liquid  
_tdb: _tdb:AlPu-04Tur.tdb:LIQUID, tdb:AlPu-10Sed.tdb:LIQUID, tdb:AlPu-16Per.tdb:LIQUID  


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

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): LIQUID, type code %, sha256 `e467c364f317d002…`

~~~~text
25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : AL PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): LIQUID, type code %, sha256 `52307f110aa139d0…`

~~~~text
32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : AL AL2PU PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): LIQUID, type code %, sha256 `782e1c2991439aa8…`

~~~~text
30: PHASE LIQUID:L % 1 1 !
31: CONST LIQUID:L : AL PU : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## ALPHA_PU (Al–Pu)

- Id: `phase:al-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 — AlPu-04Tur.tdb: 'Prototype alpha-Pu (mP16, P2_1/m)'
- Candidate (tdb_comment): alpha-Pu · mP16 · P2_1/m — AlPu-10Sed.tdb: 'Prototype alpha-Pu (mP16, P2_1/m)'
- Candidate (tdb_comment): alpha-Pu · mP16 · P2_1/m — AlPu-16Per.tdb: 'Prototype alpha-Pu (mP16, P2_1/m)'
- Stability: stable in 3 of 3 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:al-pu:pu-alpha)

Names (4): _corpus: _corpus:phase:al-pu:pu-alpha  
_tdb: _tdb:AlPu-04Tur.tdb:ALPHA_PU, tdb:AlPu-10Sed.tdb:ALPHA_PU, tdb:AlPu-16Per.tdb:ALPHA_PU  


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

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): ALPHA_PU, type code %, sha256 `e467c364f317d002…`

~~~~text
50: PHASE ALPHA_PU % 1 1 !
51: CONST ALPHA_PU : AL PU% : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): ALPHA_PU, type code %, sha256 `52307f110aa139d0…`

~~~~text
57: PHASE ALPHA_PU % 1 1 !
58: CONST ALPHA_PU : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): ALPHA_PU, type code %, sha256 `782e1c2991439aa8…`

~~~~text
55: PHASE ALPHA_PU % 1 1 !
56: CONST ALPHA_PU : AL PU% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## BETA_PU (Al–Pu)

- Id: `phase:al-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 — AlPu-04Tur.tdb: 'Prototype beta-Pu (mC34, C2/m)'
- Candidate (tdb_comment): beta-Pu · mC34 · C2/m — AlPu-10Sed.tdb: 'Prototype beta-Pu (mC34, C2/m)'
- Candidate (tdb_comment): beta-Pu · mC34 · C2/m — AlPu-16Per.tdb: 'Prototype beta-Pu (mC34, C2/m)'
- Stoichiometry: Pu 1.0000
- Stability: stable in 3 of 3 calculated diagram(s): 397.62–592.9 K, x(Pu) 1–1
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pu:pu-beta)

Names (4): _corpus: _corpus:phase:al-pu:pu-beta  
_tdb: _tdb:AlPu-04Tur.tdb:BETA_PU, tdb:AlPu-10Sed.tdb:BETA_PU, tdb:AlPu-16Per.tdb:BETA_PU  


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

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): BETA_PU, type code %, sha256 `e467c364f317d002…`

~~~~text
55: PHASE BETA_PU % 1 1 !
56: CONST BETA_PU : PU : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): BETA_PU, type code %, sha256 `52307f110aa139d0…`

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

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): BETA_PU, type code %, sha256 `782e1c2991439aa8…`

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

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_assessment that models this phase_

## GAMMA_PU (Al–Pu)

- Id: `phase:al-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 — AlPu-04Tur.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
- Candidate (tdb_comment): gamma-Pu · oF8 · Fddd — AlPu-10Sed.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
- Candidate (tdb_comment): gamma-Pu · oF8 · Fddd — AlPu-16Per.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
- Stability: stable in 3 of 3 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:al-pu:pu-gamma)

Names (4): _corpus: _corpus:phase:al-pu:pu-gamma  
_tdb: _tdb:AlPu-04Tur.tdb:GAMMA_PU, tdb:AlPu-10Sed.tdb:GAMMA_PU, tdb:AlPu-16Per.tdb:GAMMA_PU  


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

[AlPu-04Tur.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-04Tur.tdb): GAMMA_PU, type code %, sha256 `e467c364f317d002…`

~~~~text
60: PHASE GAMMA_PU % 1 1 !
61: CONST GAMMA_PU : AL PU% : !
~~~~

[AlPu-10Sed.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-10Sed.tdb): GAMMA_PU, type code %, sha256 `52307f110aa139d0…`

~~~~text
67: PHASE GAMMA_PU % 1 1 !
68: CONST GAMMA_PU : PU : !
~~~~

[AlPu-16Per.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPu-16Per.tdb): GAMMA_PU, type code %, sha256 `782e1c2991439aa8…`

~~~~text
65: PHASE GAMMA_PU % 1 1 !
66: CONST GAMMA_PU : AL PU% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.jnucmat.2009.11.023](https://doi.org/10.1016/j.jnucmat.2009.11.023) D. Sedmidubský, R.J.M. Konings, P. Souček, Ab-initio calculations and phase diagram assessments of An–Al systems (An= U, Np, Pu), Journal of Nuclear Materials 397, 1-7 (2010).  
_assessment that models this phase_
- [doi:10.1016/j.jnucmat.2016.09.012](https://doi.org/10.1016/j.jnucmat.2016.09.012) A. Perron, P.E.A. Turchi, A. Landa, B. Oudot, B. Ravat, F. Delaunay, Thermodynamic assessments and inter-relationships between systems involving Al, Am, Ga, Pu, and U, Journal of Nuclear Materials 482, 187-200 (2016).  
_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).