Ni–Ta system

180 accepted literature values from 3 paper(s) (experimental 76, model 37, DFT 52, unspecified 15); 7 calculated phase diagram(s). 5 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (14) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	76
model	37
DFT	52
unspecified	15

Accepted values by property group
Property group	Values
invariant reaction	87
phase transition	17
phase equilibrium	24
formation	52

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
NiTa-09Zho.tdb	S.H. Zhou, Y. Wang, L.-Q. Chen, Z.-K. Liu, R.E. Napolitano, Calphad, 33, 631-41(2009). doi:10.1016/j.calphad.2009.06.006	`bca1f9df8f2b8536acb45de4df9fa4c0b96387d86fddd14bdd6c89dfc2aa2895`	viewer · TDB · JSON
NiTa-18Cac.tdb	G. Cacciamani, G. Roncallo, Y. Wang, E. Vacchieri, A. Costa, J. Alloys Compd., 730, 291-310(2018). doi:10.1016/j.jallcom.2017.09.327	`26d7ac62e4a13b7346ed211f7ac52a0deb2a68fab770ab9c769bf88e88dd609d`	viewer · TDB · JSON
NiTa-18Zho.tdb	C. Zhou, C. Guo, C. Li, Z. Du, Thermochim. Acta, 666, 135-47(2018). doi:10.1016/j.tca.2018.06.011	`34f970c38af0af5871bd5588fb09b02baf6ae2c361175f981fcd54027faaf63f`	viewer · TDB · JSON
NiTa-19Zho.tdb	C. Zhou, C. Guo, C. Li, Z. Du, Calphad, 66, 101649(2019). doi:10.1016/j.calphad.2019.101649	`02b9c3696c463343e65421714856a2af6163db2a8684a7a504a06ed04cdf6293`	viewer · TDB · JSON
NiTa-20Yan.tdb	B. Yang, C. Guo, C. Li, Z. Du, J. Phase Equilib. Diffus., 41, 500-21(2020). doi:10.1007/s11669-020-00807-3	`194d341454d3483bfd6407e8cb2ee88f7bc4d7a6bd167e5a273fea36ca212fd3`	viewer · TDB · JSON
NiTa-94Ans.tdb	I. Ansara, M. Selleby, Calphad, 18, 99-108(1994). doi:10.1016/0364-5916(94)90011-6	`30aa67cfb235eae34c77b8b61592bbc9eeff72760184c7b8211c3017009ea1a5`	viewer · TDB · JSON
NiTa-99Cui-LB.tdb	Y. Cui, Z. Jin, Z. Metallkd., 90, 233-41(1999). doi:10.1515/ijmr-1999-900310	`83612ced1f1b64909a79a1fcda667f8e344b48b069b6ffc5229042733e7c2730`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
NiTa-09Zho.tdb	2059.83	LIQUID (x(Ta) 0.55107) + NITA2_C16 (x(Ta) 0.70865) + BCC_A2 (x(Ta) 0.79055)
NiTa-09Zho.tdb	1841.96	LIQUID (x(Ta) 0.47071) + NITA_D85 (x(Ta) 0.57396) + NITA2_C16 (x(Ta) 0.6793)
NiTa-09Zho.tdb	1678.62	NI3TA_KAPPA (x(Ta) 0.25295) + NI2TA_C11B (x(Ta) 0.34404) + LIQUID (x(Ta) 0.36658)
NiTa-09Zho.tdb	1678.53	NI2TA_C11B (x(Ta) 0.34418) + LIQUID (x(Ta) 0.36684) + NITA_D85 (x(Ta) 0.50239)
NiTa-09Zho.tdb	1666.62	FCC_A1 (x(Ta) 0.13773) + LIQUID (x(Ta) 0.1448) + NI3TA_KAPPA (x(Ta) 0.24049)
NiTa-09Zho.tdb	1570.35	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12609) + NI3TA_KAPPA (x(Ta) 0.23751)
NiTa-09Zho.tdb	1570.35	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12612) + NI3TA_KAPPA (x(Ta) 0.23752)
NiTa-09Zho.tdb	603.39	NI3TA_KAPPA (x(Ta) 0.25) + NI3TA_D022 (x(Ta) 0.25) + NI2TA_C11B (x(Ta) 0.32911)
NiTa-09Zho.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.2441) + NI3TA_D022 (x(Ta) 0.25)
NiTa-09Zho.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.24405) + NI3TA_D022 (x(Ta) 0.25)
NiTa-09Zho.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.2441) + NI3TA_D022 (x(Ta) 0.25)
NiTa-09Zho.tdb	474.07	NI2TA_C11B (x(Ta) 0.33384) + NITA_D85 (x(Ta) 0.52656) + NITA2_C16 (x(Ta) 0.66561)
NiTa-18Cac.tdb	2059.83	LIQUID (x(Ta) 0.55107) + NITA2_C16 (x(Ta) 0.70865) + BCC_A2 (x(Ta) 0.79055)
NiTa-18Cac.tdb	1895.02	LIQUID (x(Ta) 0.48763) + NITA_D85 (x(Ta) 0.56708) + NITA2_C16 (x(Ta) 0.68708)
NiTa-18Cac.tdb	1678.62	NI3TA_KAPPA (x(Ta) 0.25295) + NI2TA_C11B (x(Ta) 0.34404) + LIQUID (x(Ta) 0.36658)
NiTa-18Cac.tdb	1677.57	NI2TA_C11B (x(Ta) 0.34581) + LIQUID (x(Ta) 0.36965) + NITA_D85 (x(Ta) 0.51606)
NiTa-18Cac.tdb	1666.62	FCC_A1 (x(Ta) 0.13773) + LIQUID (x(Ta) 0.1448) + NI3TA_KAPPA (x(Ta) 0.24049)
NiTa-18Cac.tdb	1570.35	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12609) + NI3TA_KAPPA (x(Ta) 0.23751)
NiTa-18Cac.tdb	1570.35	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12612) + NI3TA_KAPPA (x(Ta) 0.23752)
NiTa-18Cac.tdb	603.39	NI3TA_KAPPA (x(Ta) 0.25) + NI3TA_D022 (x(Ta) 0.25) + NI2TA_C11B (x(Ta) 0.32911)
NiTa-18Cac.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.2441) + NI3TA_D022 (x(Ta) 0.25)
NiTa-18Cac.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.24405) + NI3TA_D022 (x(Ta) 0.25)
NiTa-18Cac.tdb	600.01	NI8X (x(Ta) 0.11111) + NI3TA_KAPPA (x(Ta) 0.2441) + NI3TA_D022 (x(Ta) 0.25)
NiTa-18Cac.tdb	417.95	NI2TA_C11B (x(Ta) 0.33354) + NITA_D85 (x(Ta) 0.53846) + NITA2_C16 (x(Ta) 0.66612)
NiTa-18Zho.tdb	2059.96	LIQUID (x(Ta) 0.58866) + NITA2_C16 (x(Ta) 0.70916) + BCC_A2 (x(Ta) 0.85828)
NiTa-18Zho.tdb	1843.36	LIQUID (x(Ta) 0.5175) + NITA_D85 (x(Ta) 0.57241) + NITA2_C16 (x(Ta) 0.68067)
NiTa-18Zho.tdb	1677.07	NI3TA (x(Ta) 0.25785) + NI2TA_C11B (x(Ta) 0.33896) + LIQUID (x(Ta) 0.348)
NiTa-18Zho.tdb	1645.45	FCC_A1 (x(Ta) 0.1369) + LIQUID (x(Ta) 0.15192) + NI3TA (x(Ta) 0.23704)
NiTa-18Zho.tdb	1643.4	NI2TA_C11B (x(Ta) 0.354) + LIQUID (x(Ta) 0.40241) + NITA_D85 (x(Ta) 0.51467)
NiTa-19Zho.tdb	2059.96	LIQUID (x(Ta) 0.58866) + NITA2_C16 (x(Ta) 0.70916) + BCC_A2 (x(Ta) 0.85828)
NiTa-19Zho.tdb	1843.44	LIQUID (x(Ta) 0.51752) + NITA_D85 (x(Ta) 0.56664) + NITA2_C16 (x(Ta) 0.68068)
NiTa-19Zho.tdb	1677.44	NI3TA (x(Ta) 0.25785) + NI2TA_C11B (x(Ta) 0.34291) + LIQUID (x(Ta) 0.34803)
NiTa-19Zho.tdb	1645.58	FCC_A1 (x(Ta) 0.13682) + LIQUID (x(Ta) 0.15183) + NI3TA (x(Ta) 0.23702)
NiTa-19Zho.tdb	1642.65	NI2TA_C11B (x(Ta) 0.37152) + LIQUID (x(Ta) 0.41289) + NITA_D85 (x(Ta) 0.53082)
NiTa-20Yan.tdb	2059.96	LIQUID (x(Ta) 0.58866) + NITA2_C16 (x(Ta) 0.70916) + BCC_A2 (x(Ta) 0.85828)
NiTa-20Yan.tdb	1859.72	LIQUID (x(Ta) 0.52196) + NITA_D85 (x(Ta) 0.58419) + NITA2_C16 (x(Ta) 0.68296)
NiTa-20Yan.tdb	1677.49	NI3TA (x(Ta) 0.25782) + NI2TA_C11B (x(Ta) 0.34348) + LIQUID (x(Ta) 0.34784)
NiTa-20Yan.tdb	1645.45	FCC_A1 (x(Ta) 0.1369) + LIQUID (x(Ta) 0.15192) + NI3TA (x(Ta) 0.23704)
NiTa-20Yan.tdb	1642.61	NI2TA_C11B (x(Ta) 0.3749) + LIQUID (x(Ta) 0.41487) + NITA_D85 (x(Ta) 0.53263)
NiTa-94Ans.tdb	2058.91	LIQUID (x(Ta) 0.57885) + NITA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.78874)
NiTa-94Ans.tdb	2058.91	LIQUID (x(Ta) 0.57887) + NITA2_C16 (x(Ta) 0.66667) + BCC_A2 (x(Ta) 0.78876)
NiTa-94Ans.tdb	1843.53	LIQUID (x(Ta) 0.48014) + NITA_D85 (x(Ta) 0.5) + NITA2_C16 (x(Ta) 0.66667)
NiTa-94Ans.tdb	1843.53	LIQUID (x(Ta) 0.48004) + NITA_D85 (x(Ta) 0.5) + NITA2_C16 (x(Ta) 0.66667)
NiTa-94Ans.tdb	1843.53	LIQUID (x(Ta) 0.48019) + NITA_D85 (x(Ta) 0.5) + NITA2_C16 (x(Ta) 0.66667)
NiTa-94Ans.tdb	1676.37	NI3TA (x(Ta) 0.25) + NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.35728)
NiTa-94Ans.tdb	1676.37	NI3TA (x(Ta) 0.25) + NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.35732)
NiTa-94Ans.tdb	1676.37	NI3TA (x(Ta) 0.25) + NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.35724)
NiTa-94Ans.tdb	1673.99	NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.36173) + NITA_D85 (x(Ta) 0.5)
NiTa-94Ans.tdb	1673.99	NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.36165) + NITA_D85 (x(Ta) 0.5)
NiTa-94Ans.tdb	1673.99	NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.36177) + NITA_D85 (x(Ta) 0.5)
NiTa-94Ans.tdb	1641.47	FCC_A1 (x(Ta) 0.13606) + LIQUID (x(Ta) 0.14618) + NI3TA (x(Ta) 0.25)
NiTa-94Ans.tdb	1641.47	FCC_A1 (x(Ta) 0.13564) + LIQUID (x(Ta) 0.14575) + NI3TA (x(Ta) 0.25)
NiTa-94Ans.tdb	1555	NI8TA (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12774) + NI3TA (x(Ta) 0.25)
NiTa-94Ans.tdb	1555	NI8TA (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.12771) + NI3TA (x(Ta) 0.25)
NiTa-99Cui-LB.tdb	2067.1	LIQUID (x(Ta) 0.59515) + NITA2_C16 (x(Ta) 0.69231) + BCC_A2 (x(Ta) 0.78887)
NiTa-99Cui-LB.tdb	1842.78	LIQUID (x(Ta) 0.49273) + NITA_D85 (x(Ta) 0.53058) + NITA2_C16 (x(Ta) 0.6688)
NiTa-99Cui-LB.tdb	1676.31	NI3TA (x(Ta) 0.27144) + NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.35467)
NiTa-99Cui-LB.tdb	1676.31	NI3TA (x(Ta) 0.27149) + NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.3548)
NiTa-99Cui-LB.tdb	1663.25	NI2TA_C11B (x(Ta) 0.33333) + LIQUID (x(Ta) 0.37313) + NITA_D85 (x(Ta) 0.50035)
NiTa-99Cui-LB.tdb	1627.39	FCC_A1 (x(Ta) 0.11351) + LIQUID (x(Ta) 0.13902) + NI3TA (x(Ta) 0.23036)
NiTa-99Cui-LB.tdb	1580.56	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.11139) + NI3TA (x(Ta) 0.23084)
NiTa-99Cui-LB.tdb	1580.56	NI8X (x(Ta) 0.11111) + FCC_A1 (x(Ta) 0.11137) + NI3TA (x(Ta) 0.23084)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull NiTa-09Zho · CALPHAD hull NiTa-18Cac · CALPHAD hull NiTa-18Zho · CALPHAD hull NiTa-19Zho · CALPHAD hull NiTa-94Ans · CALPHAD hull NiTa-99Cui-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ni–Ta system (87)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
2067	liq + bcc -> C16-NiTa2	liq: Ta 0.595; bcc: Ta 0.788; C16: Ta 0.692	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 2 report
2061.15	peritectic: liquid + bcc - A2 -> NiTa2	NiTa2: Ta 0.666667	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 10 report
2061	liq. + bcc(Ta) -> NiTa2	L: Ta 0.589; bcc(Ta): Ta 0.858; NiTa2: Ta 0.709	model	[3] Zhou 2018	Table 7, p. 11, row 26 report
2061	liq + bcc -> C16-NiTa2	C16-NiTa2: Ni 0.333333, Ta 0.666667	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 4 report
2061	liq. + bcc(Ta) -> NiTa2	L: Ta 0.543; bcc(Ta): Ta 0.8; NiTa2: Ta 0.675	experimental	[3] Zhou 2018 cites Kornilov 1962	Table 7, p. 11, row 24 report
2060	liq + bcc -> C16-NiTa2	liq: Ta 0.551; bcc: Ta 0.791; C16: Ta 0.708	model	[1] Zhou 2009	Table 7, p. 8, row 1 report
2059.15	peritectic: liquid + bcc - A2 -> NiTa2	liquid: Ta 0.578; bcc - A2: Ta 0.788; NiTa2: Ta 0.666	unspecified	[2] Ansara 1994	Table II, p. 5, row 9 report
2058.15	peritectic		experimental	[2] Ansara 1994 cites ref. 62Kor	p. 1 report	[62Kor] identified N'T I a and NiTa as products obtained by peritectic reactions at 1570 and 1785°C respectively.
2051	liq + bcc -> C16-NiTa2	liq: Ta 0.559; bcc: Ta 0.799; C16: Ta 0.711	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 3 report
1851	liq + C16Ta2 -> μ-NiTa	liq: Ta 0.486; C16: Ta 0.674; μ: Ta 0.53	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 7 report
1844	liq. + NiTa2 -> μ-NiTa	NiTa2: Ni 0.333333, Ta 0.666667; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[3] Zhou 2018 cites Therkelsen 1933	Table 7, p. 11, row 19 report
1844	liq + C16Ta2 -> μ-NiTa	C16Ta2: Ni 0.333333, Ta 0.666667; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[1] Zhou 2009 cites Therkelsen 1933	Table 7, p. 8, row 8 report
1843.15	peritectic		experimental	[2] Ansara 1994 cites ref. 62Kor	p. 1 report	[62Kor] identified N'T I a and NiTa as products obtained by peritectic reactions at 1570 and 1785°C respectively.
1843.15	peritectic: liquid + NiTa2 -> NiTa	NiTa2: Ta 0.666667; NiTa: Ta 0.5	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 8 report
1843.15	peritectic: liquid + NiTa2 -> NiTa	liquid: Ta 0.48; NiTa2: Ta 0.666; NiTa: Ta 0.5	unspecified	[2] Ansara 1994	Table II, p. 5, row 7 report
1843	liq + C16Ta2 -> μ-NiTa	C16Ta2: Ni 0.333333, Ta 0.666667; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 10 report
1843	liq. + NiTa2 -> μ-NiTa	L: Ta 0.517; NiTa2: Ta 0.681; μ-NiTa: Ta 0.572	model	[3] Zhou 2018	Table 7, p. 11, row 22 report
1843	liq. + NiTa2 -> μ-NiTa	L: Ta 0.489; NiTa2: Ta 0.667; μ-NiTa: Ta 0.51	experimental	[3] Zhou 2018 cites Kornilov 1962	Table 7, p. 11, row 21 report
1842	liq + C16Ta2 -> μ-NiTa	liq: Ta 0.493; C16: Ta 0.667; μ: Ta 0.531	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 6 report
1842	liq + C16Ta2 -> μ-NiTa	liq: Ta 0.471; C16: Ta 0.679; μ: Ta 0.574	model	[1] Zhou 2009	Table 7, p. 8, row 5 report
1824	congruent melting: liq -> κ-Ni3Ta	liq: Ta 0.25; κ: Ta 0.25	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 13 report
1817	liq + C16Ta2 -> μ-NiTa	C16Ta2: Ni 0.333333, Ta 0.666667; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[1] Zhou 2009 cites Kubaschewski 1949	Table 7, p. 8, row 9 report
1815	congruent melting: liq -> κ-Ni3Ta	liq: Ni 0.75, Ta 0.25; κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Kubaschewski 1949	Table 7, p. 8, row 15 report
1814	congruent melting: liq. -> Ni3Ta	L: Ni 0.75, Ta 0.25; Ni3Ta: Ni 0.75, Ta 0.25	experimental	[3] Zhou 2018 cites Therkelsen 1933	Table 7, p. 11, row 6 report
1814	congruent melting: liq -> κ-Ni3Ta	liq: Ni 0.75, Ta 0.25; κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Therkelsen 1933	Table 7, p. 8, row 14 report
1813	congruent melting: liq. -> Ni3Ta	L: Ta 0.245; Ni3Ta: Ta 0.245	experimental	[3] Zhou 2018 cites Kubaschewski 1949	Table 7, p. 11, row 7 report
1810	congruent melting: liq. -> Ni3Ta	L: Ta 0.25; Ni3Ta: Ta 0.25	model	[3] Zhou 2018	Table 7, p. 11, row 9 report
1810	congruent melting: liq -> κ-Ni3Ta	liq: Ta 0.25; κ: Ta 0.25	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 12 report
1808	congruent melting: liq. -> Ni3Ta	L: Ta 0.25; Ni3Ta: Ta 0.25	experimental	[3] Zhou 2018 cites Kornilov 1962	Table 7, p. 11, row 8 report
1808	congruent melting: liq -> κ-Ni3Ta	liq: Ni 0.75, Ta 0.25; κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 16 report
1805	congruent melting: liq -> κ-Ni3Ta	liq: Ta 0.25; κ: Ta 0.25	model	[1] Zhou 2009	Table 7, p. 8, row 11 report
1798	liq. + NiTa2 -> μ-NiTa	L: Ta 0.576; NiTa2: Ni 0.333333, Ta 0.666667; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[3] Zhou 2018 cites Kubaschewski 1949	Table 7, p. 11, row 20 report
1678.15	peritectic: liquid + Ni3Ta -> Ni2Ta	Ni3Ta: Ta 0.25; Ni2Ta: Ta 0.333333	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 4 report
1678	liq + κ-Ni3Ta -> C11b-Ni2Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 28 report
1678	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	liq: Ta 0.367; μ: Ta 0.502; C11b: Ta 0.344	model	[1] Zhou 2009	Table 7, p. 8, row 29 report
1678	liq. + Ni3Ta -> Ni2Ta	L: Ta 0.35; Ni3Ta: Ta 0.285; Ni2Ta: Ta 0.34	experimental	[3] Zhou 2018 cites Kornilov 1962	Table 7, p. 11, row 11 report
1678	liq + κ-Ni3Ta -> C11b-Ni2Ta	liq: Ta 0.366; κ: Ta 0.253; C11b: Ta 0.344	model	[1] Zhou 2009	Table 7, p. 8, row 23 report
1677	liq. + Ni3Ta -> Ni2Ta	Ni3Ta: Ni 0.75, Ta 0.25; Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[3] Zhou 2018	Table 7, p. 11, row 12 report
1677	liq. + Ni3Ta -> Ni2Ta	L: Ta 0.348; Ni3Ta: Ta 0.258; Ni2Ta: Ta 0.339	model	[3] Zhou 2018	Table 7, p. 11, row 13 report
1676.15	peritectic: liquid + Ni3Ta -> Ni2Ta	liquid: Ta 0.357; Ni3Ta: Ta 0.25; Ni2Ta: Ta 0.333	unspecified	[2] Ansara 1994	Table II, p. 5, row 3 report
1676	liq + κ-Ni3Ta -> C11b-Ni2Ta	liq: Ta 0.355; κ: Ta 0.271; C11b: Ta 0.333	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 24 report
1674.15	eutectic: liquid -> Ni2Ta + NiTa	liquid: Ta 0.362; Ni2Ta: Ta 0.333; NiTa: Ta 0.5	unspecified	[2] Ansara 1994	Table II, p. 5, row 5 report
1673	liq + κ-Ni3Ta -> C11b-Ni2Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Kubaschewski 1949	Table 7, p. 8, row 27 report
1666	eutectic: liq -> fcc + κ-Ni3Ta	liq: Ta 0.144; fcc: Ta 0.137; κ: Ta 0.241	model	[1] Zhou 2009	Table 7, p. 8, row 17 report
1663	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	liq: Ta 0.373; μ: Ta 0.5; C11b: Ta 0.333	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 30 report
1662	liq + κ-Ni3Ta -> C11b-Ni2Ta	liq: Ta 0.357; κ: Ta 0.279; C11b: Ta 0.341	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 25 report
1647	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	liq: Ta 0.381; μ: Ta 0.504; C11b: Ta 0.349	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 31 report
1645	eutectic: liq. -> fcc(Ni) + Ni3Ta	L: Ta 0.152; fcc(Ni): Ta 0.137; Ni3Ta: Ta 0.238	model	[3] Zhou 2018	Table 7, p. 11, row 5 report
1645	eutectic: liq. -> fcc(Ni) + Ni3Ta	Ni3Ta: Ni 0.75, Ta 0.25	experimental	[3] Zhou 2018	Table 7, p. 11, row 4 report
1643	eutectic: liq. -> Ni2Ta + μ-NiTa	Ni2Ta: Ni 0.666667, Ta 0.333333; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[3] Zhou 2018	Table 7, p. 11, row 17 report
1643	eutectic: liq. -> Ni2Ta + μ-NiTa	L: Ta 0.402; Ni2Ta: Ta 0.354; μ-NiTa: Ta 0.515	model	[3] Zhou 2018	Table 7, p. 11, row 18 report
1643	eutectic: liq -> fcc + κ-Ni3Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Kubaschewski 1949	Table 7, p. 8, row 21 report
1641.15	eutectic: liquid -> fcc - A1 + Ni3Ta	liquid: Ta 0.146; fcc - A1: Ta 0.135; Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994	Table II, p. 5, row 1 report
1639	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	μ-NiTa: Ni 0.5, Ta 0.5; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Kubaschewski 1949	Table 7, p. 8, row 33 report
1638	eutectic: liq. -> fcc(Ni) + Ni3Ta	L: Ta 0.161; fcc(Ni): Ta 0.129; Ni3Ta: Ta 0.206	experimental	[3] Zhou 2018 cites Kubaschewski 1949	Table 7, p. 11, row 2 report
1634	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	μ-NiTa: Ni 0.5, Ta 0.5; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 34 report
1634	eutectic: liq. -> Ni2Ta + μ-NiTa	L: Ta 0.36; Ni2Ta: Ta 0.35; μ-NiTa: Ta 0.5	experimental	[3] Zhou 2018 cites Kornilov 1962	Table 7, p. 11, row 16 report
1633.15	eutectic: liquid -> fcc - A1 + Ni3Ta	Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 2 report
1633	eutectic: liq -> fcc + κ-Ni3Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Kornilov 1962	Table 7, p. 8, row 22 report
1633	eutectic: liq. -> fcc(Ni) + Ni3Ta	L: Ta 0.172; Ni3Ta: Ni 0.75, Ta 0.25	experimental	[3] Zhou 2018 cites Kornilov 1953	Table 7, p. 11, row 3 report
1627	eutectic: liq -> fcc + κ-Ni3Ta	liq: Ta 0.139; fcc: Ta 0.113; κ: Ta 0.23	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 18 report
1625	eutectic: liq -> fcc + κ-Ni3Ta	liq: Ta 0.153; fcc: Ta 0.139; κ: Ta 0.242	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 19 report
1623.15	eutectic: liquid -> Ni2Ta + NiTa	Ni2Ta: Ta 0.333333; NiTa: Ta 0.5	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 6 report
1623	eutectic: liq. -> Ni2Ta + μ-NiTa	L: Ta 0.428; Ni2Ta: Ta 0.371; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[3] Zhou 2018 cites Kubaschewski 1949	Table 7, p. 11, row 15 report
1618	liq + κ-Ni3Ta -> C11b-Ni2Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Therkelsen 1933	Table 7, p. 8, row 26 report
1618	liq. + Ni3Ta -> Ni2Ta	Ni3Ta: Ni 0.75, Ta 0.25; Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[3] Zhou 2018 cites Therkelsen 1933	Table 7, p. 11, row 10 report
1616	eutectic: liq. -> fcc(Ni) + Ni3Ta	Ni3Ta: Ni 0.75, Ta 0.25	experimental	[3] Zhou 2018 cites Therkelsen 1933	Table 7, p. 11, row 1 report
1616	eutectic: liq -> fcc + κ-Ni3Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25	experimental	[1] Zhou 2009 cites Therkelsen 1933	Table 7, p. 8, row 20 report
1615	eutectic: liq. -> Ni2Ta + μ-NiTa	Ni2Ta: Ni 0.666667, Ta 0.333333; μ-NiTa: Ni 0.5, Ta 0.5	experimental	[3] Zhou 2018 cites Therkelsen 1933	Table 7, p. 11, row 14 report
1615	eutectic: liq -> μ-NiTa + C11b-Ni2Ta	μ-NiTa: Ni 0.5, Ta 0.5; C11b-Ni2Ta: Ni 0.666667, Ta 0.333333	experimental	[1] Zhou 2009 cites Therkelsen 1933	Table 7, p. 8, row 32 report
1603.15	eutectoid: fcc - A1 -> Ni8Ta + Ni3Ta	Ni8Ta: Ta 0.111111; Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 12 report
1593	polymorphic: fcc -> ζ-Ni8Ta	fcc: Ni 0.888889, Ta 0.111111; ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	experimental	[1] Zhou 2009 cites Nash 1983 doi	Table 7, p. 8, row 39 report
1584	polymorphic: fcc -> ζ-Ni8Ta	ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 37 report
1584	polymorphic: fcc -> ζ-Ni8Ta	ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	model	[1] Zhou 2009	Table 7, p. 8, row 35 report
1581	polymorphic: fcc -> ζ-Ni8Ta	ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 36 report
1580	fcc -> κ-Ni3Ta + ζ-Ni8Ta	fcc: Ta 0.1114; κ: Ta 0.231; ζ: Ta 0.1111	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 41 report
1573	polymorphic: fcc -> ζ-Ni8Ta	fcc: Ni 0.888889, Ta 0.111111; ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	experimental	[1] Zhou 2009 cites Pimenov 1977	Table 7, p. 8, row 38 report
1572	fcc -> κ-Ni3Ta + ζ-Ni8Ta	κ-Ni3Ta: Ni 0.75, Ta 0.25; ζ-Ni8Ta: Ni 0.888889, Ta 0.111111	experimental	[1] Zhou 2009 cites Kornilov 1953	Table 7, p. 8, row 43 report
1571	fcc -> κ-Ni3Ta + ζ-Ni8Ta	fcc: Ta 0.126; κ: Ta 0.237; ζ: Ta 0.111	model	[1] Zhou 2009	Table 7, p. 8, row 40 report
1555.15	eutectoid: fcc - A1 -> Ni8Ta + Ni3Ta	fcc - A1: Ta 0.128; Ni8Ta: Ta 0.111; Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994	Table II, p. 5, row 11 report
1547	fcc -> κ-Ni3Ta + ζ-Ni8Ta	fcc: Ta 0.136; κ: Ta 0.242; ζ: Ta 0.111	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 42 report
603	κ-Ni3Ta + C11b-Ni2Ta -> D022-Ni3Ta	κ: Ta 0.249; D022: Ta 0.25; C11b: Ta 0.329	model	[1] Zhou 2009	Table 7, p. 8, row 44 report
600	κ-Ni3Ta -> D022-Ni3Ta + ζ-Ni8Ta	κ: Ta 0.244; D022: Ta 0.25; ζ: Ta 0.111	model	[1] Zhou 2009	Table 7, p. 8, row 45 report
474	μ-NiTa -> C16-NiTa2 + C11b-Ni2Ta	μ: Ta 0.526; C16: Ta 0.666; C11b: Ta 0.334	model	[1] Zhou 2009	Table 7, p. 8, row 46 report
231	κ-Ni3Ta -> ζ-Ni8Ta + C11b-Ni2Ta	κ: Ta 0.25; ζ: Ta 0.111; C11b: Ta 0.333	model	[1] Zhou 2009 cites Cui 1999	Table 7, p. 8, row 48 report
109	μ-NiTa -> C16-NiTa2 + C11b-Ni2Ta	μ: Ta 0.504; C16: Ta 0.667; C11b: Ta 0.333	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 47 report
42	κ-Ni3Ta -> ζ-Ni8Ta + C11b-Ni2Ta	κ: Ta 0.25; ζ: Ta 0.111; C11b: Ta 0.333	model	[1] Zhou 2009 cites Pan 2002	Table 7, p. 8, row 49 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Ni–Ta system (52)
Phase	Value	Class	Source	Location
C11b	-32.36 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 24 report
C11b	5 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 25 report
C11b	7.91 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 23 report
C11b	10.49 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 26 report
C16	-21.15 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 15 report
C16	26.77 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 13 report
C16	44.14 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 14 report
C16	50.88 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 16 report
D022	-35.29 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 43 report
D0a	-34.81 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 40 report
D0a	12.48 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 41 report
D0a	30.8 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 42 report
Mo3Mo	41.09 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 37 report
Ni1Ni2	26.77 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 13 report
Ni1Ta2	-21.15 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 15 report
Ni2Ni	7.91 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 23 report
Ni2Ta	-32.36 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 24 report
Ni3Ni	3.5 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 31 report
Ni3Ta	-35.29 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 43 report
Ni3Ta	-34.81 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 40 report
Ni3Ta	-29.29 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 32 report
Ni8Ta	-16.37 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 44 report
NiTa4Ni2Ni6	-12.92 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 17 report
NiTa4Ta2Ni6	-22.99 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 19 report
Ta1Ni2	44.14 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 14 report
Ta1Ta2	50.88 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 16 report
Ta2Ni	5 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 25 report
Ta2Ta	10.49 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 26 report
Ta3Ni	12.48 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 41 report
Ta3Ni	12.54 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 33 report
Ta3Ta	29.32 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 34 report
Ta3Ta	30.8 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 42 report
TaTa4Mo2Ni6	-17.52 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 22 report
TaTa4Ni2Ni6	-18.61 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 18 report
TaTa4Ta2Ni6	-25.51 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 20 report
TaTa4Ta2Ta6	17.05 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 21 report
ζ	-16.37 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 44 report
κ	-29.29 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 32 report
κ	-1.86 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 38 report
κ	3.5 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 31 report
κ	12.54 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 33 report
κ	18.85 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 39 report
κ	29.32 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 34 report
κ	32.08 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 35 report
κ	36.6 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 36 report
κ	41.09 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 37 report
μ	-25.51 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 20 report
μ	-22.99 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 19 report
μ	-18.61 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 18 report
μ	-17.52 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 22 report
μ	-12.92 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 17 report
μ	17.05 kJ/mol-atom	DFT	[1] Zhou 2009	Table 6, p. 7, row 21 report

Other properties

Phase transition (17)

Phase transition, Ni–Ta system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	600 K	600	κ-Ni3Ta + D022-Ni3Ta	model	[1] Zhou 2009	p. 6 report	Without specific experimental data indicating the exact temperature of the transition, we assume a temperature of 600 K for the transition from the high temperature stable compound κ -Ni3 Ta (i.e.κ -Ni3 (Mo, Ta) [6,7,10-12,15,16] to the low temperature stable D022 -Ni3 Ta phase.
Phase transition	1578.15 K	1578.15	congruent transformation: fcc - al -> Ni8Ta fcc - al: Ta 0.111; Ni8Ta: Ta 0.111	unspecified	[2] Ansara 1994	Table II, p. 5, row 13 report
Phase transition	1641 K	1641	eutectic: liq. → fcc(Ni) + Ni3Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 6 report
Phase transition	1642 K	1642	eutectic: liq. → Ni2Ta + μ-NiTa	experimental	[3] Zhou 2018	Table 5, p. 8, row 10 report
Phase transition	1642 K	1642	eutectic: liq. → Ni2Ta + μ-NiTa	experimental	[3] Zhou 2018	Table 5, p. 8, row 11 report
Phase transition	1643 K	1643	eutectic: liq. → Ni2Ta + μ-NiTa	experimental	[3] Zhou 2018	Table 5, p. 8, row 12 report
Phase transition	1644 K	1644	eutectic: liq. → Ni2Ta + μ-NiTa	experimental	[3] Zhou 2018	Table 5, p. 8, row 13 report
Phase transition	1644 K	1644	eutectic: liq. → fcc(Ni) + Ni3Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 7 report
Phase transition	1645 K	1645	eutectic: liq. → fcc(Ni) + Ni3Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 2 report
Phase transition	1649 K	1649	eutectic: liq. → fcc(Ni) + Ni3Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 4 report
Phase transition	1670 K	1670	other: B5	experimental	[3] Zhou 2018	Table 5, p. 8, row 1 report
Phase transition	1671 K	1671	other: B5	experimental	[3] Zhou 2018	Table 5, p. 8, row 3 report
Phase transition	1676 K	1676	peritectic: liq. + Ni3Ta → Ni2Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 8 report
Phase transition	1678 K	1678	peritectic: liq. + Ni3Ta → Ni2Ta	experimental	[3] Zhou 2018	Table 5, p. 8, row 9 report
Phase transition	1703 K	1703	other: B6	experimental	[3] Zhou 2018	Table 5, p. 8, row 5 report
Phase transition	1820.15 K	1820.15	congruent melting: liquid -> Ni3Ta liquid: Ta 0.25; Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994	Table II, p. 5, row 14 report
Phase transition	1823.15 K	1823.15	congruent melting: liquid -> Ni3Ta liquid: Ta 0.25; Ni3Ta: Ta 0.25	unspecified	[2] Ansara 1994 cites ref. 84Nas	Table II, p. 5, row 15 report

Phase equilibrium (24)

Phase equilibrium, Ni–Ta system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition		Ni2Ta + μ-NiTa Ni2Ta: Ni 0.665, Ta 0.335	experimental	[3] Zhou 2018	Table 3, p. 3, row 6 report
Phase composition		Ni2Ta + μ-NiTa Ni2Ta: Ni 0.667, Ta 0.333	experimental	[3] Zhou 2018	Table 3, p. 3, row 7 report
Phase composition		Ni3Ta + Ni2Ta + μ-NiTa Ni3Ta: Ni 0.746, Ta 0.254	experimental	[3] Zhou 2018	Table 3, p. 3, row 5 report
Phase composition		Ni3Ta + fcc(Ni) Ni3Ta: Ni 0.757, Ta 0.243	experimental	[3] Zhou 2018	Table 3, p. 3, row 4 report
Phase composition		Ni3Ta + fcc(Ni) Ni3Ta: Ni 0.765, Ta 0.235	experimental	[3] Zhou 2018	Table 3, p. 3, row 3 report
Phase composition		NiTa2 + μ-NiTa NiTa2: Ni 0.375, Ta 0.625	experimental	[3] Zhou 2018	Table 3, p. 3, row 11 report
Phase composition		NiTa2 + μ-NiTa + Ni2Ta NiTa2: Ni 0.394, Ta 0.607	experimental	[3] Zhou 2018	Table 3, p. 3, row 10 report
Phase composition		bcc(Ta) + NiTa2 + μ-NiTa bcc(Ta): Ni 0.027, Ta 0.973	experimental	[3] Zhou 2018	Table 3, p. 3, row 12 report
Phase composition		fcc(Ni) fcc(Ni): Ni 0.918, Ta 0.082	experimental	[3] Zhou 2018	Table 3, p. 3, row 1 report
Phase composition		fcc(Ni) + Ni3Ta fcc(Ni): Ni 0.857, Ta 0.143	experimental	[3] Zhou 2018	Table 3, p. 3, row 2 report
Phase composition		μ-NiTa + Ni2Ta μ-NiTa: Ni 0.478, Ta 0.522	experimental	[3] Zhou 2018	Table 3, p. 3, row 9 report
Phase composition		μ-NiTa + Ni2Ta μ-NiTa: Ni 0.507, Ta 0.493	experimental	[3] Zhou 2018	Table 3, p. 3, row 8 report
Phase composition	1473	Ni2Ta + μ-NiTa Ni2Ta: Ni 0.66, Ta 0.34; μ-NiTa: Ni 0.482, Ta 0.518	experimental	[3] Zhou 2018	Table 4, p. 8, row 9 report
Phase composition	1473	Ni2Ta + μ-NiTa Ni2Ta: Ni 0.657, Ta 0.343; μ-NiTa: Ni 0.483, Ta 0.517	experimental	[3] Zhou 2018	Table 4, p. 8, row 10 report
Phase composition	1473	Ni3Ta + Ni2Ta Ni3Ta: Ni 0.757, Ta 0.244; Ni2Ta: Ni 0.666, Ta 0.335	experimental	[3] Zhou 2018	Table 4, p. 8, row 8 report
Phase composition	1473	NiTa2 + bcc(Ta) NiTa2: Ni 0.296, Ta 0.704; bcc(Ta): Ni 0.011, Ta 0.989	experimental	[3] Zhou 2018	Table 4, p. 8, row 12 report
Phase composition	1473	fcc(Ni) fcc(Ni): Ni 0.881, Ta 0.119	experimental	[3] Zhou 2018	Table 4, p. 8, row 3 report
Phase composition	1473	fcc(Ni) fcc(Ni): Ni 0.902, Ta 0.099	experimental	[3] Zhou 2018	Table 4, p. 8, row 1 report
Phase composition	1473	fcc(Ni) fcc(Ni): Ni 0.894, Ta 0.106	experimental	[3] Zhou 2018	Table 4, p. 8, row 2 report
Phase composition	1473	fcc(Ni) + Ni3Ta fcc(Ni): Ni 0.882, Ta 0.118; Ni3Ta: Ni 0.768, Ta 0.232	experimental	[3] Zhou 2018	Table 4, p. 8, row 4 report
Phase composition	1473	fcc(Ni) + Ni3Ta fcc(Ni): Ni 0.878, Ta 0.122; Ni3Ta: Ni 0.767, Ta 0.233	experimental	[3] Zhou 2018	Table 4, p. 8, row 5 report
Phase composition	1473	fcc(Ni) + Ni3Ta fcc(Ni): Ni 0.877, Ta 0.123; Ni3Ta: Ni 0.762, Ta 0.238	experimental	[3] Zhou 2018	Table 4, p. 8, row 7 report
Phase composition	1473	fcc(Ni) + Ni3Ta fcc(Ni): Ni 0.876, Ta 0.124; Ni3Ta: Ni 0.763, Ta 0.237	experimental	[3] Zhou 2018	Table 4, p. 8, row 6 report
Phase composition	1473	μ-NiTa + NiTa2 μ-NiTa: Ni 0.441, Ta 0.559; NiTa2: Ni 0.324, Ta 0.676	experimental	[3] Zhou 2018	Table 4, p. 8, row 11 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

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). doi:10.1016/j.calphad.2009.06.006
I. Ansara, M. Selleby, Thermodynamic analysis of the Ni-Ta system., Calphad 18, 99-107 (1994). doi:10.1016/0364-5916(94)90011-6
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). doi:10.1016/j.tca.2018.06.011

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}