# Ni–Ta phases

> Ni–Ta system: 14 phases (tier A 6, tier C 3, liquid 1, needs_review 4); 11 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references.

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

14 phases (tier A 6, tier C 3, liquid 1, needs_review 4); 11 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

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

Table: Phases of the Ni–Ta system (14)

| Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models |
|---|---|---|---|---:|---:|
| [BCC_A2](#phase-ni-ta-bcc-a2); _phase:ni-ta:bcc-a2_ | W · A2 · cI2 · Im-3m (229) | tier A: standard phase name | stable in 7 of 7 calculated diagram(s): 300–4000 K, x(Ta) 0.78874–1 | 10 | 7 |
| [NI3X_II_D0A](#phase-ni-ta-d0a-ii-ni3x); _phase:ni-ta:d0a-ii-ni3x_ |  | needs_review | not stable in 1 calculated diagram(s) | 0 | 1 |
| [NI3X_D0A](#phase-ni-ta-d0a-ni3x); _phase:ni-ta:d0a-ni3x_ |  | needs_review | not stable in 1 calculated diagram(s) | 0 | 1 |
| [FCC_A1](#phase-ni-ta-fcc-a1); _phase:ni-ta:fcc-a1_ | Cu · A1 · cF4 · Fm-3m (225) | tier A: standard phase name | stable in 7 of 7 calculated diagram(s): 300–1731.47 K, x(Ta) 0–0.13773 | 36 | 7 |
| [HCP_A3](#phase-ni-ta-hcp-a3); _phase:ni-ta:hcp-a3_ | Mg · A3 · hP2 · P6_3/mmc (194) | tier A: standard phase name | not stable in 7 calculated diagram(s) | 0 | 7 |
| [LIQUID](#phase-ni-ta-liquid); _phase:ni-ta:liquid_ | liquid | liquid | stable in 7 of 7 calculated diagram(s): 1627.39–4000 K, x(Ta) 0–1 | 70 | 7 |
| [NI2TA_C11B](#phase-ni-ta-ni2ta-c11b); _phase:ni-ta:ni2ta-c11b_ | MoSi2 · C11_b · tI6 · I4/mmm (139) | tier A: standard phase name | stable in 7 of 7 calculated diagram(s): 300–1678.62 K, x(Ta) 0.32694–0.3749 | 39 | 7 |
| [NI3TA](#phase-ni-ta-ni3ta); _phase:ni-ta:ni3ta_ | NbPt3 · mP16 · P2_1/m (11) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 5 of 5 calculated diagram(s): 300–1819.32 K, x(Ta) 0.23036–0.27149 | 33 | 5 |
| [NI3TA_D022](#phase-ni-ta-ni3ta-d022); _phase:ni-ta:ni3ta-d022_ | Al3Ti · D0_22 · tI8 · I4/mmm (139) | tier A: standard phase name | stable in 2 of 2 calculated diagram(s): 300–603.39 K, x(Ta) 0.25–0.25 | 2 | 2 |
| [NI3TA_KAPPA](#phase-ni-ta-ni3ta-kappa); _phase:ni-ta:ni3ta-kappa_ | NbPt3 · mP16 · P2_1/m (11) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 2 of 2 calculated diagram(s): 600.01–1804.12 K, x(Ta) 0.23751–0.25295 | 26 | 2 |
| [NI8TA](#phase-ni-ta-ni8ta); _phase:ni-ta:ni8ta_ |  | needs_review | stable in 1 of 1 calculated diagram(s): 300–1577.5 K, x(Ta) 0.11111–0.11111 | 4 | 1 |
| [NI8X](#phase-ni-ta-ni8x); _phase:ni-ta:ni8x_ | Pt8Ti · tI18 · I4/mmm (139) | tier C: assessor-stated (Hallstedt 2025 crystallographic table) | stable in 3 of 3 calculated diagram(s): 300–1583.35 K, x(Ta) 0.11111–0.11111 | 12 | 3 |
| [NITA_D85](#phase-ni-ta-nita-d85); _phase:ni-ta:nita-d85_ |  | needs_review | stable in 7 of 7 calculated diagram(s): 300–1895.02 K, x(Ta) 0.5–0.58419 | 38 | 7 |
| [NITA2_C16](#phase-ni-ta-nita2-c16); _phase:ni-ta:nita2-c16_ | Al2Cu · C16 · tI12 · I4/mcm (140) | tier A: standard phase name | stable in 7 of 7 calculated diagram(s): 300–2067.1 K, x(Ta) 0.66537–0.71234 | 27 | 7 |

## BCC_A2 (Ni–Ta)

- Id: `phase:ni-ta: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 7 of 7 calculated diagram(s): 300–4000 K, x(Ta) 0.78874–1
- Literature: 10 values (10 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:bcc-a2)

Names (11): _corpus: _corpus:phase:ni-ta:bcc-a2  
_paper: _paper:10.1016/0364-5916(94)90011-6:bcc - A2, paper:10.1016/j.calphad.2009.06.006:bcc, paper:10.1016/j.tca.2018.06.011:bcc(Ta)  
_tdb: _tdb:NiTa-09Zho.tdb:BCC_A2, tdb:NiTa-18Cac.tdb:BCC_A2, tdb:NiTa-18Zho.tdb:BCC_A2, tdb:NiTa-19Zho.tdb:BCC_A2, tdb:NiTa-20Yan.tdb:BCC_A2, tdb:NiTa-94Ans.tdb:BCC_A2, tdb:NiTa-99Cui-LB.tdb:BCC_A2  


### TDB models of BCC_A2 (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): BCC_A2, type code %B, sha256 `bca1f9df8f2b8536…`

~~~~text
33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): BCC_A2, type code %B, sha256 `26d7ac62e4a13b73…`

~~~~text
36: PHASE BCC_A2 %B 2 1 3 !
37: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): BCC_A2, type code %B, sha256 `34f970c38af0af58…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): BCC_A2, type code %B, sha256 `02b9c3696c463343…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): BCC_A2, type code %B, sha256 `194d341454d3483b…`

~~~~text
31: PHASE BCC_A2 %B 2 1 3 !
32: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): BCC_A2, type code %B, sha256 `30aa67cfb235eae3…`

~~~~text
32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : NI TA% : VA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): BCC_A2, type code %B, sha256 `83612ced1f1b6490…`

~~~~text
37: PHASE BCC_A2 %B 2 1 3 !
38: CONST BCC_A2 : NI TA% : VA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_

## NI3X_II_D0A (Ni–Ta)

- Id: `phase:ni-ta:d0a-ii-ni3x`; status `needs_review`
- No structure assigned. Why: unrecognised_name_tokens:NI3X,II
- Candidate (name_token): beta-Cu3Ti · D0_a · oP8 · Pmmn (59) — Strukturbericht/word 'D0A' in the TDB name
- Candidate (tdb_comment): beta-Cu3Ti · oP8 · Pmmn — NiTa-09Zho.tdb: 'Prototype beta-Cu3Ti (oP8, Pmmn)'
- 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:ni-ta:d0a-ii-ni3x)

Names (2): _corpus: _corpus:phase:ni-ta:d0a-ii-ni3x  
_tdb: _tdb:NiTa-09Zho.tdb:NI3X_II_D0A  


### TDB models of NI3X_II_D0A (1): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI3X_II_D0A, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
74: PHASE NI3X_II_D0A % 2 3 1 !
75: CONST NI3X_II_D0A : NI% TA : NI TA% : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase_

## NI3X_D0A (Ni–Ta)

- Id: `phase:ni-ta:d0a-ni3x`; status `needs_review`
- No structure assigned. Why: unrecognised_name_tokens:NI3X
- Candidate (name_token): beta-Cu3Ti · D0_a · oP8 · Pmmn (59) — Strukturbericht/word 'D0A' in the TDB name
- Candidate (sgte_mmc2): beta-Cu3Ti · D0_a · oP8 · Pmmn (59) — Hallstedt 2025 mmc2 row for NI3X_D0A: MoNi3
- Candidate (tdb_comment): beta-Cu3Ti · oP8 · Pmmn — NiTa-09Zho.tdb: 'Prototype beta-Cu3Ti (oP8, Pmmn)'
- 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:ni-ta:d0a-ni3x)

Names (2): _corpus: _corpus:phase:ni-ta:d0a-ni3x  
_tdb: _tdb:NiTa-09Zho.tdb:NI3X_D0A  


### TDB models of NI3X_D0A (1): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI3X_D0A, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
68: PHASE NI3X_D0A % 3 2 1 1 !
69: CONST NI3X_D0A : TA NI : NI : TA NI : !
~~~~

Example references (1 of 1; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase_

## FCC_A1 (Ni–Ta)

- Id: `phase:ni-ta: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 7 of 7 calculated diagram(s): 300–1731.47 K, x(Ta) 0–0.13773
- Literature: 36 values (36 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:fcc-a1)

Names (12): _corpus: _corpus:phase:ni-ta:fcc-a1  
_paper: _paper:10.1016/0364-5916(94)90011-6:fcc - A1, paper:10.1016/0364-5916(94)90011-6:fcc - al, paper:10.1016/j.calphad.2009.06.006:fcc, paper:10.1016/j.tca.2018.06.011:fcc(Ni)  
_tdb: _tdb:NiTa-09Zho.tdb:FCC_A1, tdb:NiTa-18Cac.tdb:FCC_A1, tdb:NiTa-18Zho.tdb:FCC_A1, tdb:NiTa-19Zho.tdb:FCC_A1, tdb:NiTa-20Yan.tdb:FCC_A1, tdb:NiTa-94Ans.tdb:FCC_A1, tdb:NiTa-99Cui-LB.tdb:FCC_A1  


### TDB models of FCC_A1 (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): FCC_A1, type code %A, sha256 `bca1f9df8f2b8536…`

~~~~text
28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): FCC_A1, type code %A, sha256 `26d7ac62e4a13b73…`

~~~~text
31: PHASE FCC_A1 %A 2 1 1 !
32: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): FCC_A1, type code %A, sha256 `34f970c38af0af58…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): FCC_A1, type code %A, sha256 `02b9c3696c463343…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): FCC_A1, type code %A, sha256 `194d341454d3483b…`

~~~~text
26: PHASE FCC_A1 %A 2 1 1 !
27: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): FCC_A1, type code %A, sha256 `30aa67cfb235eae3…`

~~~~text
27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : NI% TA : VA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): FCC_A1, type code %A, sha256 `83612ced1f1b6490…`

~~~~text
32: PHASE FCC_A1 %A 2 1 1 !
33: CONST FCC_A1 : NI% TA : VA : !
~~~~

Example references (8 of 8; assessments first): 

- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_
- [doi:10.1179/030634583790427649](https://doi.org/10.1179/030634583790427649) P. Nash, D. R. F. West, Ni–Al and Ni–Ta phase diagrams, Metal Science 17, 99-100 (1983).  
_cited as the source of values for this phase_

## HCP_A3 (Ni–Ta)

- Id: `phase:ni-ta: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 7 calculated diagram(s)
- Literature: 0 values (0 accepted) from 0 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:hcp-a3)

Names (8): _corpus: _corpus:phase:ni-ta:hcp-a3  
_tdb: _tdb:NiTa-09Zho.tdb:HCP_A3, tdb:NiTa-18Cac.tdb:HCP_A3, tdb:NiTa-18Zho.tdb:HCP_A3, tdb:NiTa-19Zho.tdb:HCP_A3, tdb:NiTa-20Yan.tdb:HCP_A3, tdb:NiTa-94Ans.tdb:HCP_A3, tdb:NiTa-99Cui-LB.tdb:HCP_A3  


### TDB models of HCP_A3 (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): HCP_A3, type code %A, sha256 `bca1f9df8f2b8536…`

~~~~text
38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : NI TA : VA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): HCP_A3, type code %A, sha256 `26d7ac62e4a13b73…`

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

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): HCP_A3, type code %A, sha256 `34f970c38af0af58…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : NI TA : VA : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): HCP_A3, type code %A, sha256 `02b9c3696c463343…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : NI TA : VA : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): HCP_A3, type code %A, sha256 `194d341454d3483b…`

~~~~text
36: PHASE HCP_A3 %A 2 1 0.5 !
37: CONST HCP_A3 : NI TA : VA : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): HCP_A3, type code %A, sha256 `30aa67cfb235eae3…`

~~~~text
37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : NI TA : VA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): HCP_A3, type code %A, sha256 `83612ced1f1b6490…`

~~~~text
42: PHASE HCP_A3 %A 2 1 0.5 !
43: CONST HCP_A3 : NI TA : VA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_

## LIQUID (Ni–Ta)

- Id: `phase:ni-ta:liquid`; status `assigned`
- Structure: liquid; type `st:liquid`; liquid; confidence high
- Stability: stable in 7 of 7 calculated diagram(s): 1627.39–4000 K, x(Ta) 0–1
- Literature: 70 values (70 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:liquid)

Names (11): _corpus: _corpus:phase:ni-ta:liquid  
_paper: _paper:10.1016/0364-5916(94)90011-6:liquid, paper:10.1016/j.calphad.2009.06.006:liq, paper:10.1016/j.tca.2018.06.011:L  
_tdb: _tdb:NiTa-09Zho.tdb:LIQUID, tdb:NiTa-18Cac.tdb:LIQUID, tdb:NiTa-18Zho.tdb:LIQUID, tdb:NiTa-19Zho.tdb:LIQUID, tdb:NiTa-20Yan.tdb:LIQUID, tdb:NiTa-94Ans.tdb:LIQUID, tdb:NiTa-99Cui-LB.tdb:LIQUID  


### TDB models of LIQUID (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): LIQUID, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): LIQUID, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
26: PHASE LIQUID:L % 1 1 !
27: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): LIQUID, type code %, sha256 `34f970c38af0af58…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): LIQUID, type code %, sha256 `02b9c3696c463343…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): LIQUID, type code %, sha256 `194d341454d3483b…`

~~~~text
21: PHASE LIQUID:L % 1 1 !
22: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): LIQUID, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : NI TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): LIQUID, type code %, sha256 `83612ced1f1b6490…`

~~~~text
27: PHASE LIQUID:L % 1 1 !
28: CONST LIQUID:L : NI TA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_

## NI2TA_C11B (Ni–Ta)

- Id: `phase:ni-ta:ni2ta-c11b`; status `assigned`
- Structure: MoSi2 · C11_b · tI6 · I4/mmm (139); type `st:c11-b-mosi2-ti6`; tier A: standard phase name; confidence high
- Caveat: partitioned order/disorder model in NiTa-09Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-18Cac.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-18Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-19Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-20Yan.tdb also describes the disordered state
- Stability: stable in 7 of 7 calculated diagram(s): 300–1678.62 K, x(Ta) 0.32694–0.3749
- Literature: 39 values (39 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni2ta-c11b)

Names (12): _corpus: _corpus:phase:ni-ta:ni2ta-c11b  
_paper: _paper:10.1016/0364-5916(94)90011-6:Ni2Ta, paper:10.1016/j.calphad.2009.06.006:C11b, paper:10.1016/j.calphad.2009.06.006:C11b-Ni2Ta, paper:10.1016/j.tca.2018.06.011:Ni2Ta  
_tdb: _tdb:NiTa-09Zho.tdb:NI2TA_C11B, tdb:NiTa-18Cac.tdb:NI2TA_C11B, tdb:NiTa-18Zho.tdb:NI2TA_C11B, tdb:NiTa-19Zho.tdb:NI2TA_C11B, tdb:NiTa-20Yan.tdb:NI2TA_C11B, tdb:NiTa-94Ans.tdb:NI2TA_C11B, tdb:NiTa-99Cui-LB.tdb:NI2TA_C11B  


### TDB models of NI2TA_C11B (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI2TA_C11B, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
53: PHASE NI2TA_C11B % 2 2 1 !
54: CONST NI2TA_C11B : NI% TA : NI TA% : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NI2TA_C11B, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
56: PHASE NI2TA_C11B % 2 2 1 !
57: CONST NI2TA_C11B : NI% TA : NI TA% : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): NI2TA_C11B, type code %, sha256 `34f970c38af0af58…`

~~~~text
47: PHASE NI2TA_C11B % 2 2 1 !
48: CONST NI2TA_C11B : NI% TA : NI TA% : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): NI2TA_C11B, type code %, sha256 `02b9c3696c463343…`

~~~~text
47: PHASE NI2TA_C11B % 2 2 1 !
48: CONST NI2TA_C11B : NI% TA : NI TA% : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): NI2TA_C11B, type code %, sha256 `194d341454d3483b…`

~~~~text
47: PHASE NI2TA_C11B % 2 2 1 !
48: CONST NI2TA_C11B : NI% TA : NI TA% : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): NI2TA_C11B, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
42: PHASE NI2TA_C11B % 2 2 1 !
43: CONST NI2TA_C11B : NI : TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): NI2TA_C11B, type code %, sha256 `83612ced1f1b6490…`

~~~~text
47: PHASE NI2TA_C11B % 2 2 1 !
48: CONST NI2TA_C11B : NI : TA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_

## NI3TA (Ni–Ta)

- Id: `phase:ni-ta:ni3ta`; status `assigned`
- Structure: NbPt3 · mP16 · P2_1/m (11); type `st:nbpt3-mp16`; 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 5 of 5 calculated diagram(s): 300–1819.32 K, x(Ta) 0.23036–0.27149
- Literature: 33 values (33 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni3ta)

Names (9): _corpus: _corpus:phase:ni-ta:ni3ta  
_paper: _paper:10.1016/0364-5916(94)90011-6:Ni3Ta, paper:10.1016/j.calphad.2009.06.006:Ni3Ta, paper:10.1016/j.tca.2018.06.011:Ni3Ta  
_tdb: _tdb:NiTa-18Zho.tdb:NI3TA, tdb:NiTa-19Zho.tdb:NI3TA, tdb:NiTa-20Yan.tdb:NI3TA, tdb:NiTa-94Ans.tdb:NI3TA, tdb:NiTa-99Cui-LB.tdb:NI3TA  


### TDB models of NI3TA (5): PHASE and CONSTITUENT statements as written

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): NI3TA, type code %, sha256 `34f970c38af0af58…`

~~~~text
42: PHASE NI3TA % 2 3 1 !
43: CONST NI3TA : NI% TA : NI TA% : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): NI3TA, type code %, sha256 `02b9c3696c463343…`

~~~~text
42: PHASE NI3TA % 2 3 1 !
43: CONST NI3TA : NI% TA : NI TA% : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): NI3TA, type code %, sha256 `194d341454d3483b…`

~~~~text
42: PHASE NI3TA % 2 3 1 !
43: CONST NI3TA : NI% TA : NI TA% : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): NI3TA, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
49: PHASE NI3TA % 2 3 1 !
50: CONST NI3TA : NI : TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): NI3TA, type code %, sha256 `83612ced1f1b6490…`

~~~~text
53: PHASE NI3TA % 2 3 1 !
54: CONST NI3TA : NI% TA : NI TA% : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_
- [doi:10.1016/0001-6160(67)90369-0](https://doi.org/10.1016/0001-6160%2867%2990369-0) B.C Giessen, N.J Grant, The crystal structure of Tani3 and its change on cold working, Acta Metallurgica 15, 871-877 (1967).  
_cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_reports values for this phase_

## NI3TA_D022 (Ni–Ta)

- Id: `phase:ni-ta:ni3ta-d022`; status `assigned`
- Structure: Al3Ti · D0_22 · tI8 · I4/mmm (139); type `st:d0-22-al3ti-ti8`; tier A: standard phase name; confidence high
- Stoichiometry: Ni 0.7500, Ta 0.2500
- Stability: stable in 2 of 2 calculated diagram(s): 300–603.39 K, x(Ta) 0.25–0.25
- Literature: 2 values (2 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni3ta-d022)

Names (4): _corpus: _corpus:phase:ni-ta:ni3ta-d022  
_paper: _paper:10.1016/j.calphad.2009.06.006:D022  
_tdb: _tdb:NiTa-09Zho.tdb:NI3TA_D022, tdb:NiTa-18Cac.tdb:NI3TA_D022  


### TDB models of NI3TA_D022 (2): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI3TA_D022, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
43: PHASE NI3TA_D022 % 2 3 1 !
44: CONST NI3TA_D022 : NI : TA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NI3TA_D022, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
46: PHASE NI3TA_D022 % 2 3 1 !
47: CONST NI3TA_D022 : NI : TA : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_

## NI3TA_KAPPA (Ni–Ta)

- Id: `phase:ni-ta:ni3ta-kappa`; status `assigned`
- Structure: NbPt3 · mP16 · P2_1/m (11); type `st:nbpt3-mp16`; 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 2 of 2 calculated diagram(s): 600.01–1804.12 K, x(Ta) 0.23751–0.25295
- Literature: 26 values (26 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni3ta-kappa)

Names (5): _corpus: _corpus:phase:ni-ta:ni3ta-kappa  
_paper: _paper:10.1016/j.calphad.2009.06.006:κ, paper:10.1016/j.calphad.2009.06.006:κ-Ni3Ta  
_tdb: _tdb:NiTa-09Zho.tdb:NI3TA_KAPPA, tdb:NiTa-18Cac.tdb:NI3TA_KAPPA  


### TDB models of NI3TA_KAPPA (2): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI3TA_KAPPA, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
48: PHASE NI3TA_KAPPA % 2 3 1 !
49: CONST NI3TA_KAPPA : NI% TA : NI TA% : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NI3TA_KAPPA, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
51: PHASE NI3TA_KAPPA % 2 3 1 !
52: CONST NI3TA_KAPPA : NI% TA : NI TA% : !
~~~~

Example references (2 of 2; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_

## NI8TA (Ni–Ta)

- Id: `phase:ni-ta:ni8ta`; status `needs_review`
- No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
- Candidate (dft_oqmd): I4/mmm (139) — on-hull OQMD Ni8 Ta1 at x(TA)=0.1111
- Candidate (tdb_comment): Pt8Ti · tI18 · I4/mmm — NiTa-94Ans.tdb: 'Prototype Pt8Ti (tI18, I4/mmm)'
- Stoichiometry: Ni 0.8889, Ta 0.1111
- Stability: stable in 1 of 1 calculated diagram(s): 300–1577.5 K, x(Ta) 0.11111–0.11111
- Literature: 4 values (4 accepted) from 2 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni8ta)

Names (4): _corpus: _corpus:phase:ni-ta:ni8ta  
_paper: _paper:10.1016/0364-5916(94)90011-6:Ni8Ta, paper:10.1016/j.calphad.2009.06.006:Ni8Ta  
_tdb: _tdb:NiTa-94Ans.tdb:NI8TA  


### TDB models of NI8TA (1): PHASE and CONSTITUENT statements as written

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): NI8TA, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
54: PHASE NI8TA % 2 8 1 !
55: CONST NI8TA : NI : TA : !
~~~~

Example references (3 of 3; assessments first): 

- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/bf02811559](https://doi.org/10.1007/bf02811559) J. M. Larson, R. Taggart, D. H. Polonis, Ni8Ta in nickel-rich Ni−Ta alloys, Metall Trans 1, 485-489 (1970).  
_cited as the source of values for this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_reports values for this phase_

## NI8X (Ni–Ta)

- Id: `phase:ni-ta:ni8x`; status `assigned`
- Structure: Pt8Ti · tI18 · I4/mmm (139); type `st:pt8ti-ti18`; 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 (name_has_descriptive_tokens:NI8X, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
- Stoichiometry: Ni 0.8889, Ta 0.1111
- Stability: stable in 3 of 3 calculated diagram(s): 300–1583.35 K, x(Ta) 0.11111–0.11111
- Literature: 12 values (12 accepted) from 1 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:ni8x)

Names (6): _corpus: _corpus:phase:ni-ta:ni8x  
_paper: _paper:10.1016/j.calphad.2009.06.006:ζ, paper:10.1016/j.calphad.2009.06.006:ζ-Ni8Ta  
_tdb: _tdb:NiTa-09Zho.tdb:NI8X, tdb:NiTa-18Cac.tdb:NI8X, tdb:NiTa-99Cui-LB.tdb:NI8X  


### TDB models of NI8X (3): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NI8X, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
79: PHASE NI8X % 2 8 1 !
80: CONST NI8X : NI : TA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NI8X, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
71: PHASE NI8X % 2 8 1 !
72: CONST NI8X : NI : TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): NI8X, type code %, sha256 `83612ced1f1b6490…`

~~~~text
58: PHASE NI8X % 2 8 1 !
59: CONST NI8X : NI : TA : !
~~~~

Example references (4 of 4; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_
- [doi:10.1179/030634583790427649](https://doi.org/10.1179/030634583790427649) P. Nash, D. R. F. West, Ni–Al and Ni–Ta phase diagrams, Metal Science 17, 99-100 (1983).  
_cited as the source of values for this phase_

## NITA_D85 (Ni–Ta)

- Id: `phase:ni-ta:nita-d85`; status `needs_review`
- No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_D8_5; stoichiometry_contradicts_D8_5:NiTa-94Ans.tdb
- Candidate (literature_printed): Fe7W6 · hR13 — printed with a label mapped to this phase
- Candidate (name_token): Fe7W6 · D8_5 · hR13 · R-3m (166) — Strukturbericht/word 'D85' in the TDB name
- Candidate (sgte_mmc2): Fe7W6 · D8_5 · hR13 · R-3m (166) — Hallstedt 2025 mmc2 row for NITA_D85: NiTa
- Candidate (tdb_comment): Fe7W6 · hR13 · R-3m; mu-phase — NiTa-09Zho.tdb: 'Prototype Fe7W6 (hR13, R-3m; mu-phase)'
- Candidate (tdb_comment): Fe7W6 · hR13 · R-3m; mu-phase — NiTa-18Cac.tdb: 'Prototype Fe7W6 (hR13, R-3m; mu-phase); 4:2:1:6 in 18Cac'
- Candidate (tdb_comment): Fe7W6 · hR13 · R-3m; mu-phase — NiTa-18Zho.tdb: 'Prototype Fe7W6 (hR13, R-3m; mu-phase)'
- Candidate (tdb_comment): Fe7W6 · hR13 · R-3m; mu-phase — NiTa-19Zho.tdb: 'Prototype Fe7W6 (hR13, R-3m; mu-phase)'
- Candidate (tdb_comment): Fe7W6 · hR13 · R-3m; mu-phase — NiTa-20Yan.tdb: 'Prototype Fe7W6 (hR13, R-3m; mu-phase)'
- Stability: stable in 7 of 7 calculated diagram(s): 300–1895.02 K, x(Ta) 0.5–0.58419
- Literature: 38 values (38 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:nita-d85)

Names (12): _corpus: _corpus:phase:ni-ta:nita-d85  
_paper: _paper:10.1016/0364-5916(94)90011-6:NiTa, paper:10.1016/j.calphad.2009.06.006:μ, paper:10.1016/j.calphad.2009.06.006:μ-NiTa, paper:10.1016/j.tca.2018.06.011:μ-NiTa  
_tdb: _tdb:NiTa-09Zho.tdb:NITA_D85, tdb:NiTa-18Cac.tdb:NITA_D85, tdb:NiTa-18Zho.tdb:NITA_D85, tdb:NiTa-19Zho.tdb:NITA_D85, tdb:NiTa-20Yan.tdb:NITA_D85, tdb:NiTa-94Ans.tdb:NITA_D85, tdb:NiTa-99Cui-LB.tdb:NITA_D85  


### TDB models of NITA_D85 (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NITA_D85, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
58: PHASE NITA_D85 % 4 1 4 2 6 !
59: CONST NITA_D85 : NI TA : TA : NI TA : NI% TA : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NITA_D85, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
61: PHASE NITA_D85 % 4 1 4 2 6 !
62: CONST NITA_D85 : NI TA : NI TA% : NI TA : NI% TA : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): NITA_D85, type code %, sha256 `34f970c38af0af58…`

~~~~text
52: PHASE NITA_D85 % 4 1 4 2 6 !
53: CONST NITA_D85 : NI TA : TA : NI TA : NI% TA : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): NITA_D85, type code %, sha256 `02b9c3696c463343…`

~~~~text
52: PHASE NITA_D85 % 4 1 4 2 6 !
53: CONST NITA_D85 : NI TA : TA : NI TA : NI% TA : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): NITA_D85, type code %, sha256 `194d341454d3483b…`

~~~~text
52: PHASE NITA_D85 % 4 1 4 2 6 !
53: CONST NITA_D85 : NI TA : TA : NI TA : NI% TA : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): NITA_D85, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
59: PHASE NITA_D85 % 2 1 1 !
60: CONST NITA_D85 : NI : TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): NITA_D85, type code %, sha256 `83612ced1f1b6490…`

~~~~text
63: PHASE NITA_D85 % 4 1 4 2 6 !
64: CONST NITA_D85 : NI TA : TA : NI TA : NI : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_assessment that models this phase_

## NITA2_C16 (Ni–Ta)

- Id: `phase:ni-ta:nita2-c16`; status `assigned`
- Structure: Al2Cu · C16 · tI12 · I4/mcm (140); type `st:c16-al2cu-ti12`; tier A: standard phase name; confidence high
- Caveat: partitioned order/disorder model in NiTa-09Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-18Cac.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-18Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-19Zho.tdb also describes the disordered state
- Caveat: partitioned order/disorder model in NiTa-20Yan.tdb also describes the disordered state
- Stability: stable in 7 of 7 calculated diagram(s): 300–2067.1 K, x(Ta) 0.66537–0.71234
- Literature: 27 values (27 accepted) from 3 papers
- Interactive: [phase registry entry](https://orchid-project.org/phases/#phase:ni-ta:nita2-c16)

Names (13): _corpus: _corpus:phase:ni-ta:nita2-c16  
_paper: _paper:10.1016/0364-5916(94)90011-6:NiTa2, paper:10.1016/j.calphad.2009.06.006:C16, paper:10.1016/j.calphad.2009.06.006:C16-NiTa2, paper:10.1016/j.calphad.2009.06.006:C16Ta2, paper:10.1016/j.tca.2018.06.011:NiTa2  
_tdb: _tdb:NiTa-09Zho.tdb:NITA2_C16, tdb:NiTa-18Cac.tdb:NITA2_C16, tdb:NiTa-18Zho.tdb:NITA2_C16, tdb:NiTa-19Zho.tdb:NITA2_C16, tdb:NiTa-20Yan.tdb:NITA2_C16, tdb:NiTa-94Ans.tdb:NITA2_C16, tdb:NiTa-99Cui-LB.tdb:NITA2_C16  


### TDB models of NITA2_C16 (7): PHASE and CONSTITUENT statements as written

[NiTa-09Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-09Zho.tdb): NITA2_C16, type code %, sha256 `bca1f9df8f2b8536…`

~~~~text
63: PHASE NITA2_C16 % 2 1 2 !
64: CONST NITA2_C16 : NI% TA : NI TA% : !
~~~~

[NiTa-18Cac.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Cac.tdb): NITA2_C16, type code %, sha256 `26d7ac62e4a13b73…`

~~~~text
66: PHASE NITA2_C16 % 2 1 2 !
67: CONST NITA2_C16 : NI% TA : NI TA% : !
~~~~

[NiTa-18Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-18Zho.tdb): NITA2_C16, type code %, sha256 `34f970c38af0af58…`

~~~~text
57: PHASE NITA2_C16 % 2 1 2 !
58: CONST NITA2_C16 : NI% TA : NI TA% : !
~~~~

[NiTa-19Zho.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-19Zho.tdb): NITA2_C16, type code %, sha256 `02b9c3696c463343…`

~~~~text
57: PHASE NITA2_C16 % 2 1 2 !
58: CONST NITA2_C16 : NI% TA : NI TA% : !
~~~~

[NiTa-20Yan.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-20Yan.tdb): NITA2_C16, type code %, sha256 `194d341454d3483b…`

~~~~text
57: PHASE NITA2_C16 % 2 1 2 !
58: CONST NITA2_C16 : NI% TA : NI TA% : !
~~~~

[NiTa-94Ans.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-94Ans.tdb): NITA2_C16, type code %, sha256 `30aa67cfb235eae3…`

~~~~text
64: PHASE NITA2_C16 % 2 1 2 !
65: CONST NITA2_C16 : NI : TA : !
~~~~

[NiTa-99Cui-LB.tdb](https://orchid-project.org/data/databases/sgte-binary/NiTa-99Cui-LB.tdb): NITA2_C16, type code %, sha256 `83612ced1f1b6490…`

~~~~text
68: PHASE NITA2_C16 % 2 1 2 !
69: CONST NITA2_C16 : NI% TA : TA : !
~~~~

Example references (7 of 7; assessments first): 

- [doi:10.1016/j.calphad.2009.06.006](https://doi.org/10.1016/j.calphad.2009.06.006) S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Solution-based thermodynamic modeling of the Ni–Ta and Ni–Mo–Ta systems using first-principle calculations, Calphad 33, 631-641 (2009).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/j.tca.2018.06.011](https://doi.org/10.1016/j.tca.2018.06.011) Chenyang Zhou, Cuiping Guo, Changrong Li, Zhenmin Du, Thermodynamic optimization of the Ni–Ta system supported by the key experiments, Thermochimica Acta 666, 135-147 (2018).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1016/0364-5916(94)90011-6](https://doi.org/10.1016/0364-5916%2894%2990011-6) I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994).  
_assessment that models this phase; reports values for this phase_
- [doi:10.1007/s11669-020-00807-3](https://doi.org/10.1007/s11669-020-00807-3) Bo Yang, Cuiping Guo, Changrong Li, Zhenmin Du, Experimental Investigation and Thermodynamic Modelling of the Fe-Ni-Ta System, J. Phase Equilib. Diffus. 41, 500-521 (2020).  
_assessment that models this phase_
- [doi:10.1016/j.calphad.2019.101649](https://doi.org/10.1016/j.calphad.2019.101649) C. Zhou, C. Guo, C. Li, Z. Du, Thermodynamic description of the Co–Ni–Ta system, Calphad 66 (2019) 101649, https://doi.org/10.1016/j.calphad.2019.101649 17  
_assessment that models this phase_
- [doi:10.1016/j.jallcom.2017.09.327](https://doi.org/10.1016/j.jallcom.2017.09.327) G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018).  
_assessment that models this phase_
- [doi:10.1515/ijmr-1999-900310](https://doi.org/10.1515/ijmr-1999-900310) Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).  
_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).