# Al–Pt phases > Al–Pt system: 14 phases (tier A 8, tier B 2, tier C 1, liquid 1, needs_review 2); 12 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-PT.html · Markdown: https://data.orchid-project.org/phases/pages/AL-PT.md 14 phases (tier A 8, tier B 2, tier C 1, liquid 1, needs_review 2); 12 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-PT) · [full JSON](https://data.orchid-project.org/phases/systems/AL-PT.json) · [Al–Pt system page](https://data.orchid-project.org/systems/AL-PT.html) · [Markdown](https://data.orchid-project.org/phases/pages/AL-PT.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Al–Pt system (14) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [AL21PT5](#phase-al-pt-al21pt5); _phase:al-pt:al21pt5_ | Li21Si5 · cF416 · F-43m (216) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 300–1085.55 K, x(Pt) 0.19231–0.19231 | 6 | 2 | | [AL21PT8](#phase-al-pt-al21pt8); _phase:al-pt:al21pt8_ | Al21Pt8 · tI116 · I4_1/a (88) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1406.74 K, x(Pt) 0.27586–0.27586 | 8 | 2 | | [AL2PT_C1](#phase-al-pt-al2pt-c1); _phase:al-pt:al2pt-c1_ | CaF2 · C1 · cF12 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1677.09 K, x(Pt) 0.33333–0.33333 | 6 | 2 | | [AL3PT2_D513](#phase-al-pt-al3pt2-d513); _phase:al-pt:al3pt2-d513_ | Ni2Al3 · D5_13 · hP5 · P-3m1 (164) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1795.51 K, x(Pt) 0.4–0.4 | 11 | 2 | | [AL3PT5](#phase-al-pt-al3pt5); _phase:al-pt:al3pt5_ | Ge3Rh5 · oP16 · Pbam (55) | tier B: DFT-supported (unique MP + OQMD match) | stable in 2 of 2 calculated diagram(s): 300–1735.72 K, x(Pt) 0.625–0.625 | 7 | 2 | | [ALPT_B20](#phase-al-pt-alpt-b20); _phase:al-pt:alpt-b20_ | FeSi · B20 · cP8 · P2_13 (198) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–1826.41 K, x(Pt) 0.5–0.5 | 7 | 2 | | [ALPT2](#phase-al-pt-alpt2); _phase:al-pt:alpt2_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–1621.35 K, x(Pt) 0.66667–0.66667 | 0 | 1 | | [ALPT3_L12](#phase-al-pt-alpt3-l12); _phase:al-pt:alpt3-l12_ | AuCu3 · L1_2 · cP4 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 300–1824.92 K, x(Pt) 0.74881–0.78294 | 5 | 1 | | [BCC_A2](#phase-al-pt-bcc-a2); _phase:al-pt:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | not stable in 2 calculated diagram(s) | 0 | 3 | | [B2_BCC](#phase-al-pt-bcc-b2); _phase:al-pt:bcc-b2_ | CsCl · B2 · cP2 · Pm-3m (221) | tier A: standard phase name | stable in 1 of 1 calculated diagram(s): 1534.5–1817.32 K, x(Pt) 0.49818–0.55566 | 0 | 1 | | [FCC_4SL](#phase-al-pt-fcc-4sl); _phase:al-pt:fcc-4sl_ | | needs_review | stable in 1 of 1 calculated diagram(s): 300–2499.43 K, x(Pt) 0–1 | 0 | 1 | | [FCC_A1](#phase-al-pt-fcc-a1); _phase:al-pt:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–2329.92 K, x(Pt) 0–1 | 4 | 3 | | [HCP_A3](#phase-al-pt-hcp-a3); _phase:al-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-al-pt-liquid); _phase:al-pt:liquid_ | liquid | liquid | stable in 2 of 2 calculated diagram(s): 928.07–2500 K, x(Pt) 0–1 | 21 | 2 | ## AL21PT5 (Al–Pt) - Id: `phase:al-pt:al21pt5`; status `assigned` - Structure: Li21Si5 · cF416 · F-43m (216); type `st:li21si5-cf416`; 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 0.8077, Pt 0.1923 - Stability: stable in 2 of 2 calculated diagram(s): 300–1085.55 K, x(Pt) 0.19231–0.19231 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:al21pt5) Names (4): _corpus: _corpus:phase:al-pt:al21pt5 _paper: _paper:10.1361/105497100770340011:Al21Pt5 _tdb: _tdb:AlPt-00Wu.tdb:AL21PT5, tdb:AlPt-16Liu.tdb:AL21PT5 ### TDB models of AL21PT5 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): AL21PT5, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 42: PHASE AL21PT5 % 2 21 5 ! 43: CONST AL21PT5 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): AL21PT5, type code %, sha256 `98460d9947af8257…` ~~~~text 65: PHASE AL21PT5 % 2 21 5 ! 66: CONST AL21PT5 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## AL21PT8 (Al–Pt) - Id: `phase:al-pt:al21pt8`; status `assigned` - Structure: Al21Pt8 · tI116 · I4_1/a (88); type `st:al21pt8-ti116`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: Al 0.7241, Pt 0.2759 - Stability: stable in 2 of 2 calculated diagram(s): 300–1406.74 K, x(Pt) 0.27586–0.27586 - Literature: 8 values (8 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:al21pt8) Names (6): _corpus: _corpus:phase:al-pt:al21pt8 _mp: _mp:mp-aaaaacyg _oqmd: _oqmd:oqmd-54935 _paper: _paper:10.1361/105497100770340011:Al21Pt8 _tdb: _tdb:AlPt-00Wu.tdb:AL21PT8, tdb:AlPt-16Liu.tdb:AL21PT8 ### TDB models of AL21PT8 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): AL21PT8, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 47: PHASE AL21PT8 % 2 21 8 ! 48: CONST AL21PT8 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): AL21PT8, type code %, sha256 `98460d9947af8257…` ~~~~text 70: PHASE AL21PT8 % 2 21 8 ! 71: CONST AL21PT8 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## AL2PT_C1 (Al–Pt) - Id: `phase:al-pt:al2pt-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-aaaaacfu and oqmd-10564, space group 225 - Stoichiometry: Al 0.6667, Pt 0.3333 - Stability: stable in 2 of 2 calculated diagram(s): 300–1677.09 K, x(Pt) 0.33333–0.33333 - Literature: 6 values (6 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:al2pt-c1) Names (6): _corpus: _corpus:phase:al-pt:al2pt-c1 _mp: _mp:mp-aaaaacfu _oqmd: _oqmd:oqmd-10564 _paper: _paper:10.1361/105497100770340011:Al2Pt _tdb: _tdb:AlPt-00Wu.tdb:AL2PT_C1, tdb:AlPt-16Liu.tdb:AL2PT_C1 ### TDB models of AL2PT_C1 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): AL2PT_C1, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 52: PHASE AL2PT_C1 % 2 2 1 ! 53: CONST AL2PT_C1 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): AL2PT_C1, type code %, sha256 `98460d9947af8257…` ~~~~text 75: PHASE AL2PT_C1 % 2 2 1 ! 76: CONST AL2PT_C1 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## AL3PT2_D513 (Al–Pt) - Id: `phase:al-pt:al3pt2-d513`; status `assigned` - Structure: Ni2Al3 · D5_13 · hP5 · P-3m1 (164); type `st:d5-13-ni2al3-hp5`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaaqdl and oqmd-10565, space group 164 - Stoichiometry: Al 0.6000, Pt 0.4000 - Stability: stable in 2 of 2 calculated diagram(s): 300–1795.51 K, x(Pt) 0.4–0.4 - Literature: 11 values (11 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:al3pt2-d513) Names (6): _corpus: _corpus:phase:al-pt:al3pt2-d513 _mp: _mp:mp-aaaaaqdl _oqmd: _oqmd:oqmd-10565 _paper: _paper:10.1361/105497100770340011:Al3Pt2 _tdb: _tdb:AlPt-00Wu.tdb:AL3PT2_D513, tdb:AlPt-16Liu.tdb:AL3PT2_D513 ### TDB models of AL3PT2_D513 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): AL3PT2_D513, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 57: PHASE AL3PT2_D513 % 2 3 2 ! 58: CONST AL3PT2_D513 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): AL3PT2_D513, type code %, sha256 `98460d9947af8257…` ~~~~text 80: PHASE AL3PT2_D513 % 2 3 2 ! 81: CONST AL3PT2_D513 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## AL3PT5 (Al–Pt) - Id: `phase:al-pt:al3pt5`; status `assigned` - Structure: Ge3Rh5 · oP16 · Pbam (55); type `st:ge3rh5-op16`; tier B: DFT-supported (unique MP + OQMD match); confidence high - Stoichiometry: Al 0.3750, Pt 0.6250 - Stability: stable in 2 of 2 calculated diagram(s): 300–1735.72 K, x(Pt) 0.625–0.625 - Literature: 7 values (7 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:al3pt5) Names (6): _corpus: _corpus:phase:al-pt:al3pt5 _mp: _mp:mp-aaaaacft _oqmd: _oqmd:oqmd-9984 _paper: _paper:10.1361/105497100770340011:Al3Pt5 _tdb: _tdb:AlPt-00Wu.tdb:AL3PT5, tdb:AlPt-16Liu.tdb:AL3PT5 ### TDB models of AL3PT5 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): AL3PT5, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 67: PHASE AL3PT5 % 2 3 5 ! 68: CONST AL3PT5 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): AL3PT5, type code %, sha256 `98460d9947af8257…` ~~~~text 90: PHASE AL3PT5 % 2 3 5 ! 91: CONST AL3PT5 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## ALPT_B20 (Al–Pt) - Id: `phase:al-pt:alpt-b20`; status `assigned` - Structure: FeSi · B20 · cP8 · P2_13 (198); type `st:b20-fesi-cp8`; tier A: standard phase name; confidence high - Caveat: DFT agrees: on-hull mp-aaaaaqdk and oqmd-10562, space group 198 - Stoichiometry: Al 0.5000, Pt 0.5000 - Stability: stable in 2 of 2 calculated diagram(s): 300–1826.41 K, x(Pt) 0.5–0.5 - Literature: 7 values (7 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:alpt-b20) Names (6): _corpus: _corpus:phase:al-pt:alpt-b20 _mp: _mp:mp-aaaaaqdk _oqmd: _oqmd:oqmd-10562 _paper: _paper:10.1361/105497100770340011:AlPt _tdb: _tdb:AlPt-00Wu.tdb:ALPT_B20, tdb:AlPt-16Liu.tdb:ALPT_B20 ### TDB models of ALPT_B20 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): ALPT_B20, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 62: PHASE ALPT_B20 % 2 1 1 ! 63: CONST ALPT_B20 : AL : PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): ALPT_B20, type code %, sha256 `98460d9947af8257…` ~~~~text 85: PHASE ALPT_B20 % 2 1 1 ! 86: CONST ALPT_B20 : AL : PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## ALPT2 (Al–Pt) - Id: `phase:al-pt:alpt2`; status `needs_review` - No structure assigned. Why: mp_oqmd_space_groups_differ; no_structure_token; sgte_mmc2_rows_disagree - Candidate (dft_mp): Pnma (62) — on-hull MP AlPt2 at x(PT)=0.6667 - Candidate (dft_oqmd): Pmma (51) — on-hull OQMD Al1 Pt2 at x(PT)=0.6667 - Candidate (sgte_mmc2): Co2Si · C37 · oP12 · Pnma (62) — Hallstedt 2025 mmc2 row for ALPT2: AlPt2 (HT) - Candidate (sgte_mmc2): GaPt2 · oP24 · Pmma (51) — Hallstedt 2025 mmc2 row for ALPT2: AlPt2 (LT) - Candidate (tdb_comment): GaPt2 · oP24 · Pmma — AlPt-16Liu.tdb: 'Prototype GaPt2 (oP24, Pmma), LT and Co2Si (oP12, Pnma, C23), HT' - Stoichiometry: Al 0.3333, Pt 0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–1621.35 K, x(Pt) 0.66667–0.66667 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:alpt2) Names (2): _corpus: _corpus:phase:al-pt:alpt2 _tdb: _tdb:AlPt-16Liu.tdb:ALPT2 ### TDB models of ALPT2 (1): PHASE and CONSTITUENT statements as written [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): ALPT2, type code %, sha256 `98460d9947af8257…` ~~~~text 95: PHASE ALPT2 % 2 1 2 ! 96: CONST ALPT2 : AL : PT : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ ## ALPT3_L12 (Al–Pt) - Id: `phase:al-pt:alpt3-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 AlPt-00Wu.tdb also describes the disordered state - Stability: stable in 1 of 1 calculated diagram(s): 300–1824.92 K, x(Pt) 0.74881–0.78294 - Literature: 5 values (5 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:alpt3-l12) Names (3): _corpus: _corpus:phase:al-pt:alpt3-l12 _paper: _paper:10.1361/105497100770340011:AlPt3 _tdb: _tdb:AlPt-00Wu.tdb:ALPT3_L12 ### TDB models of ALPT3_L12 (1): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): ALPT3_L12, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 72: PHASE ALPT3_L12 % 2 1 3 ! 73: CONST ALPT3_L12 : AL% PT : AL PT% : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## BCC_A2 (Al–Pt) - Id: `phase:al-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:al-pt:bcc-a2) Names (4): _corpus: _corpus:phase:al-pt:bcc-a2 _tdb: _tdb:AlPt-00Wu.tdb:BCC_A2, tdb:AlPt-16Liu.tdb:A2_BCC, tdb:AlPt-16Liu.tdb:BCC_A2 ### TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): BCC_A2, type code %B, sha256 `ff7e2a521050dadb…` ~~~~text 32: PHASE BCC_A2 %B 2 1 3 ! 33: CONST BCC_A2 : AL PT : VA : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): A2_BCC, type code %B, sha256 `98460d9947af8257…` ~~~~text 50: PHASE A2_BCC %B 2 1 3 ! 51: CONST A2_BCC : AL PT : VA : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): BCC_A2, type code %B, sha256 `98460d9947af8257…` ~~~~text 45: PHASE BCC_A2 %B 2 1 3 ! 46: CONST BCC_A2 : AL PT : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase_ ## B2_BCC (Al–Pt) - Id: `phase:al-pt:bcc-b2`; status `assigned` - Structure: CsCl · B2 · cP2 · Pm-3m (221); type `st:b2-cscl-cp2`; tier A: standard phase name; confidence high - Caveat: AlPt-16Liu.tdb: ordered phase with disordered part A2_BCC (order/disorder model) - Caveat: partitioned order/disorder model in AlPt-16Liu.tdb also describes the disordered state - Stability: stable in 1 of 1 calculated diagram(s): 1534.5–1817.32 K, x(Pt) 0.49818–0.55566 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:bcc-b2) Names (2): _corpus: _corpus:phase:al-pt:bcc-b2 _tdb: _tdb:AlPt-16Liu.tdb:B2_BCC ### TDB models of B2_BCC (1): PHASE and CONSTITUENT statements as written [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): B2_BCC, type code %BO, sha256 `98460d9947af8257…` ~~~~text 55: PHASE B2_BCC %BO 3 0.5 0.5 3 ! 56: CONST B2_BCC : AL% PT : AL PT% : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ ## FCC_4SL (Al–Pt) - Id: `phase:al-pt:fcc-4sl`; status `needs_review` - No structure assigned. Why: assessment_declared_blocked_by:order_disorder_ambiguity; order_disorder_ambiguity:AlPt-16Liu.tdb_model_is_partitioned; sgte_mmc2_row_disagrees_with_name:FCC_4SL; unrecognised_name_tokens:4SL - Candidate (dft_mp): I4_1/a (88) — on-hull MP Al21Pt8 at x(PT)=0.2759 - Candidate (dft_mp): Fm-3m (225) — on-hull MP Al2Pt at x(PT)=0.3333 - Candidate (dft_mp): P-3m1 (164) — on-hull MP Al3Pt2 at x(PT)=0.4000 - Candidate (dft_mp): Pbam (55) — on-hull MP Al3Pt5 at x(PT)=0.6250 - Candidate (dft_mp): P2_13 (198) — on-hull MP AlPt at x(PT)=0.5000 - Candidate (dft_mp): Pnma (62) — on-hull MP AlPt2 at x(PT)=0.6667 - Candidate (dft_oqmd): P213 (198) — on-hull OQMD Al1 Pt1 at x(PT)=0.5000 - Candidate (dft_oqmd): Pmma (51) — on-hull OQMD Al1 Pt2 at x(PT)=0.6667 - Stability: stable in 1 of 1 calculated diagram(s): 300–2499.43 K, x(Pt) 0–1 - Literature: 0 values (0 accepted) from 0 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:fcc-4sl) Names (2): _corpus: _corpus:phase:al-pt:fcc-4sl _tdb: _tdb:AlPt-16Liu.tdb:FCC_4SL ### TDB models of FCC_4SL (1): PHASE and CONSTITUENT statements as written [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): FCC_4SL, type code %AY, sha256 `98460d9947af8257…` ~~~~text 40: PHASE FCC_4SL:F %AY 5 0.25 0.25 0.25 0.25 1 ! 41: CONST FCC_4SL:F : AL PT% : AL PT% : AL PT% : AL% PT : VA : ! ~~~~ Example references (1 of 1; assessments first): - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ ## FCC_A1 (Al–Pt) - Id: `phase:al-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): 300–2329.92 K, x(Pt) 0–1 - Literature: 4 values (4 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:fcc-a1) Names (6): _corpus: _corpus:phase:al-pt:fcc-a1 _paper: _paper:10.1361/105497100770340011:(Al), paper:10.1361/105497100770340011:(Pt) _tdb: _tdb:AlPt-00Wu.tdb:FCC_A1, tdb:AlPt-16Liu.tdb:A1_FCC, tdb:AlPt-16Liu.tdb:FCC_A1 ### TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): FCC_A1, type code %A, sha256 `ff7e2a521050dadb…` ~~~~text 27: PHASE FCC_A1 %A 2 1 1 ! 28: CONST FCC_A1 : AL PT : VA : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): A1_FCC, type code %A, sha256 `98460d9947af8257…` ~~~~text 35: PHASE A1_FCC %A 2 1 1 ! 36: CONST A1_FCC : AL PT : VA : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): FCC_A1, type code %A, sha256 `98460d9947af8257…` ~~~~text 30: PHASE FCC_A1 %A 2 1 1 ! 31: CONST FCC_A1 : AL PT : VA : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## HCP_A3 (Al–Pt) - Id: `phase:al-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:al-pt:hcp-a3) Names (3): _corpus: _corpus:phase:al-pt:hcp-a3 _tdb: _tdb:AlPt-00Wu.tdb:HCP_A3, tdb:AlPt-16Liu.tdb:HCP_A3 ### TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): HCP_A3, type code %A, sha256 `ff7e2a521050dadb…` ~~~~text 37: PHASE HCP_A3 %A 2 1 0.5 ! 38: CONST HCP_A3 : AL PT : VA : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): HCP_A3, type code %A, sha256 `98460d9947af8257…` ~~~~text 60: PHASE HCP_A3 %A 2 1 0.5 ! 61: CONST HCP_A3 : AL PT : VA : ! ~~~~ Example references (2 of 2; assessments first): - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase_ ## LIQUID (Al–Pt) - Id: `phase:al-pt:liquid`; status `assigned` - Structure: liquid; type `st:liquid`; liquid; confidence high - Stability: stable in 2 of 2 calculated diagram(s): 928.07–2500 K, x(Pt) 0–1 - Literature: 21 values (21 accepted) from 1 papers - Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:al-pt:liquid) Names (4): _corpus: _corpus:phase:al-pt:liquid _paper: _paper:10.1361/105497100770340011:L _tdb: _tdb:AlPt-00Wu.tdb:LIQUID, tdb:AlPt-16Liu.tdb:LIQUID ### TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written [AlPt-00Wu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-00Wu.tdb): LIQUID, type code %, sha256 `ff7e2a521050dadb…` ~~~~text 22: PHASE LIQUID:L % 1 1 ! 23: CONST LIQUID:L : AL PT : ! ~~~~ [AlPt-16Liu.tdb](https://orchid-project.org/data/databases/sgte-binary/AlPt-16Liu.tdb): LIQUID, type code %, sha256 `98460d9947af8257…` ~~~~text 25: PHASE LIQUID:L % 1 1 ! 26: CONST LIQUID:L : AL PT : ! ~~~~ Example references (3 of 3; assessments first): - [doi:10.1361/105497100770340011](https://doi.org/10.1361/105497100770340011) Kaisheng Wu, Zhanpeng Jin, Thermodynamic assessment of the Al-Pt binary system, JPE 21, 221-226 (2000). _assessment that models this phase; reports values for this phase_ - [doi:10.1016/j.calphad.2016.08.002](https://doi.org/10.1016/j.calphad.2016.08.002) X.L. Liu, G. Lindwall, R. Otis, H.Kim, Z.-K. Liu, Calphad, 55, 88-102(2016). _assessment that models this phase_ - [doi:10.1002/zaac.19643290116](https://doi.org/10.1002/zaac.19643290116) Reinhold Huch, Wilhelm Klemm, Das System Platin–Aluminium, Zeitschrift anorg allge chemie 329, 123-135 (1964). _cited as the source of values for this phase_ ## Please cite - R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735970 - R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065 Also cite B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes. ```bibtex @misc{orchid_phase_registry_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID-Registry: phase registry of binary systems}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23735970}, url = {https://doi.org/10.5281/zenodo.23735970}, note = {Version 1, machine-extracted} } @misc{orchid_data_2026, author = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon}, title = {{ORCHID data: umbrella record of the ORCHID datasets}}, version = {2026.10}, publisher = {Zenodo}, year = {2026}, doi = {10.5281/zenodo.23736065}, url = {https://doi.org/10.5281/zenodo.23736065}, note = {Version 1, machine-extracted} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).