Ni–Ta phases

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 · full JSON · Ni–Ta system page · Markdown · field reference

Phases of the Ni–Ta system (14)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
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		needs_review	not stable in 1 calculated diagram(s)	0	1
NI3X_D0A phase:ni-ta:d0a-ni3x		needs_review	not stable in 1 calculated diagram(s)	0	1
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	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	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	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	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	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	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		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	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		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	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

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: BCC_A2, type code %B, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: BCC_A2, type code %B, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: BCC_A2, type code %B, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: BCC_A2, type code %B, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: BCC_A2, type code %B, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: BCC_A2, type code %B, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: BCC_A2, type code %B, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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

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: NI3X_II_D0A, type code %, sha256 bca1f9df8f2b8536…

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 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

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: NI3X_D0A, type code %, sha256 bca1f9df8f2b8536…

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 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

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: FCC_A1, type code %A, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: FCC_A1, type code %A, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: FCC_A1, type code %A, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: FCC_A1, type code %A, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: FCC_A1, type code %A, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: FCC_A1, type code %A, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: FCC_A1, type code %A, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).
assessment that models this phase
doi: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

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: HCP_A3, type code %A, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: HCP_A3, type code %A, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: HCP_A3, type code %A, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: HCP_A3, type code %A, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: HCP_A3, type code %A, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: HCP_A3, type code %A, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: HCP_A3, type code %A, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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

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: LIQUID, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: LIQUID, type code %, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: LIQUID, type code %, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: LIQUID, type code %, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: LIQUID, type code %, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: LIQUID, type code %, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: LIQUID, type code %, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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

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: NI2TA_C11B, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NI2TA_C11B, type code %, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: NI2TA_C11B, type code %, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: NI2TA_C11B, type code %, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: NI2TA_C11B, type code %, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: NI2TA_C11B, type code %, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: NI2TA_C11B, type code %, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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
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

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: NI3TA, type code %, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: NI3TA, type code %, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: NI3TA, type code %, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: NI3TA, type code %, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: NI3TA, type code %, sha256 83612ced1f1b6490…

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 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 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 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 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 Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).
assessment that models this phase
doi:10.1016/0001-6160(67)90369-0 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 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

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: NI3TA_D022, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NI3TA_D022, type code %, sha256 26d7ac62e4a13b73…

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 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 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
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

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: NI3TA_KAPPA, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NI3TA_KAPPA, type code %, sha256 26d7ac62e4a13b73…

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 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 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

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: NI8TA, type code %, sha256 30aa67cfb235eae3…

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 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 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 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
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

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: NI8X, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NI8X, type code %, sha256 26d7ac62e4a13b73…

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

NiTa-99Cui-LB.tdb: NI8X, type code %, sha256 83612ced1f1b6490…

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 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 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 Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999).
assessment that models this phase
doi: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

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: NITA_D85, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NITA_D85, type code %, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: NITA_D85, type code %, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: NITA_D85, type code %, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: NITA_D85, type code %, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: NITA_D85, type code %, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: NITA_D85, type code %, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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

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: NITA2_C16, type code %, sha256 bca1f9df8f2b8536…

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

NiTa-18Cac.tdb: NITA2_C16, type code %, sha256 26d7ac62e4a13b73…

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

NiTa-18Zho.tdb: NITA2_C16, type code %, sha256 34f970c38af0af58…

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

NiTa-19Zho.tdb: NITA2_C16, type code %, sha256 02b9c3696c463343…

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

NiTa-20Yan.tdb: NITA2_C16, type code %, sha256 194d341454d3483b…

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

NiTa-94Ans.tdb: NITA2_C16, type code %, sha256 30aa67cfb235eae3…

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

NiTa-99Cui-LB.tdb: NITA2_C16, type code %, sha256 83612ced1f1b6490…

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 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 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 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 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 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 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 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). doi: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). doi: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.

@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}
}