Co–Nb–Ni system

87 accepted literature values from 1 paper(s) (experimental 12, DFT 7, unspecified 68); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	12
DFT	7
unspecified	68

Accepted values by property group
Property group	Values
phase equilibrium	62
crystal structure	25

Other properties

Phase equilibrium (62)

Phase equilibrium, Co–Nb–Ni system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1173.15	Ni3Nb Ni3Nb: Co 0.111, Nb 0.239, Ni 0.65	experimental	[1] Zhou 2020	Table IV, p. 10, row 12 report
Phase composition	1173.15	τ τ: Co 0.393, Nb 0.24, Ni 0.367	experimental	[1] Zhou 2020	Table IV, p. 10, row 6 report
Phase composition	1173.15	τ τ: Co 0.29, Nb 0.24, Ni 0.47	experimental	[1] Zhou 2020	Table IV, p. 10, row 8 report
Phase composition	1173.15	τ τ: Co 0.242, Nb 0.241, Ni 0.517	experimental	[1] Zhou 2020	Table IV, p. 10, row 9 report
Phase composition	1173.15	τ τ: Co 0.538, Nb 0.246, Ni 0.216	experimental	[1] Zhou 2020	Table IV, p. 10, row 3 report
Phase composition	1173.15	τ τ: Co 0.66, Nb 0.238, Ni 0.102	experimental	[1] Zhou 2020	Table IV, p. 10, row 1 report
Phase composition	1173.15	τ τ: Co 0.352, Nb 0.241, Ni 0.407	experimental	[1] Zhou 2020	Table IV, p. 10, row 7 report
Phase composition	1173.15	τ τ: Co 0.461, Nb 0.24, Ni 0.299	experimental	[1] Zhou 2020	Table IV, p. 10, row 5 report
Phase composition	1173.15	τ τ: Co 0.502, Nb 0.249, Ni 0.249	experimental	[1] Zhou 2020	Table IV, p. 10, row 4 report
Phase composition	1173.15	τ τ: Co 0.602, Nb 0.241, Ni 0.157	experimental	[1] Zhou 2020	Table IV, p. 10, row 2 report
Phase composition	1173.15	τ τ: Co 0.2, Nb 0.243, Ni 0.557	experimental	[1] Zhou 2020	Table IV, p. 10, row 10 report
Phase composition	1173.15	τ + Ni3Nb τ: Co 0.194, Nb 0.23, Ni 0.576; Ni3Nb: Co 0.139, Nb 0.239, Ni 0.622	experimental	[1] Zhou 2020	Table IV, p. 10, row 11 report
Phase composition	1373.15	(Co,Ni)Nb + Ni3Nb (Co,Ni)Nb: Co 0.115, Nb 0.461, Ni 0.424; Ni3Nb: Co 0.111, Nb 0.255, Ni 0.634	unspecified	[1] Zhou 2020	Table II, p. 4, row 20 report
Phase composition	1373.15	(Co,Ni)Nb + Ni3Nb (Co,Ni)Nb: Co 0.082, Nb 0.469, Ni 0.449; Ni3Nb: Co 0.047, Nb 0.257, Ni 0.696	unspecified	[1] Zhou 2020	Table II, p. 4, row 21 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.328, Nb 0.47, Ni 0.202; λ2: Co 0.444, Nb 0.345, Ni 0.211	unspecified	[1] Zhou 2020	Table II, p. 4, row 7 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.217, Nb 0.461, Ni 0.322; λ2: Co 0.294, Nb 0.335, Ni 0.371	unspecified	[1] Zhou 2020	Table II, p. 4, row 9 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.369, Nb 0.474, Ni 0.157; λ2: Co 0.511, Nb 0.344, Ni 0.145	unspecified	[1] Zhou 2020	Table II, p. 4, row 6 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.295, Nb 0.463, Ni 0.242; λ2: Co 0.388, Nb 0.342, Ni 0.27	unspecified	[1] Zhou 2020	Table II, p. 4, row 8 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.423, Nb 0.475, Ni 0.102; λ2: Co 0.552, Nb 0.343, Ni 0.105	unspecified	[1] Zhou 2020	Table II, p. 4, row 5 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 (Co,Ni)Nb: Co 0.477, Nb 0.474, Ni 0.049; λ2: Co 0.605, Nb 0.343, Ni 0.052	unspecified	[1] Zhou 2020	Table II, p. 4, row 4 report
Phase composition	1373.15	(Co,Ni)Nb + λ2 + τ (Co,Ni)Nb: Co 0.213, Nb 0.455, Ni 0.332; λ2: Co 0.276, Nb 0.336, Ni 0.388; τ: Co 0.217, Nb 0.261, Ni 0.522	unspecified	[1] Zhou 2020	Table II, p. 4, row 19 report
Phase composition	1373.15	(Co,Ni)Nb + τ (Co,Ni)Nb: Co 0.205, Nb 0.461, Ni 0.334; τ: Co 0.187, Nb 0.267, Ni 0.546	unspecified	[1] Zhou 2020	Table II, p. 4, row 10 report
Phase composition	1373.15	Co7Nb2 Co7Nb2: Co 0.662, Nb 0.229, Ni 0.109	unspecified	[1] Zhou 2020	Table II, p. 4, row 24 report
Phase composition	1373.15	Co7Nb2 Co7Nb2: Co 0.715, Nb 0.232, Ni 0.053	unspecified	[1] Zhou 2020	Table II, p. 4, row 23 report
Phase composition	1373.15	Co7Nb2 Co7Nb2: Co 0.612, Nb 0.235, Ni 0.153	unspecified	[1] Zhou 2020	Table II, p. 4, row 25 report
Phase composition	1373.15	Co7Nb2 + fcc(Co,Ni) Co7Nb2: Co 0.659, Nb 0.23, Ni 0.111; fcc(Co,Ni): Co 0.835, Nb 0.051, Ni 0.114	unspecified	[1] Zhou 2020	Table II, p. 4, row 38 report
Phase composition	1373.15	Co7Nb2 + fcc(Co,Ni) Co7Nb2: Co 0.723, Nb 0.227, Ni 0.05; fcc(Co,Ni): Co 0.89, Nb 0.045, Ni 0.065	unspecified	[1] Zhou 2020	Table II, p. 4, row 37 report
Phase composition	1373.15	Co7Nb2 + fcc(Co,Ni) Co7Nb2: Co 0.603, Nb 0.231, Ni 0.166; fcc(Co,Ni): Co 0.785, Nb 0.063, Ni 0.152	unspecified	[1] Zhou 2020	Table II, p. 4, row 39 report
Phase composition	1373.15	Ni3Nb Ni3Nb: Co 0.05, Nb 0.236, Ni 0.714	unspecified	[1] Zhou 2020	Table II, p. 4, row 36 report
Phase composition	1373.15	Ni3Nb Ni3Nb: Co 0.101, Nb 0.235, Ni 0.664	unspecified	[1] Zhou 2020	Table II, p. 4, row 35 report
Phase composition	1373.15	Ni3Nb + fcc(Co,Ni) Ni3Nb: Co 0.117, Nb 0.225, Ni 0.658; fcc(Co,Ni): Co 0.176, Nb 0.115, Ni 0.709	unspecified	[1] Zhou 2020	Table II, p. 4, row 49 report
Phase composition	1373.15	Ni3Nb + fcc(Co,Ni) Ni3Nb: Co 0.086, Nb 0.226, Ni 0.688; fcc(Co,Ni): Co 0.131, Nb 0.119, Ni 0.75	unspecified	[1] Zhou 2020	Table II, p. 4, row 50 report
Phase composition	1373.15	Ni3Nb + fcc(Co,Ni) Ni3Nb: Co 0.137, Nb 0.234, Ni 0.629; fcc(Co,Ni): Co 0.218, Nb 0.112, Ni 0.67	unspecified	[1] Zhou 2020	Table II, p. 4, row 48 report
Phase composition	1373.15	bcc(Nb) + (Co,Ni)Nb bcc(Nb): Co 0.034, Nb 0.966, Ni 0; (Co,Ni)Nb: Co 0.364, Nb 0.538, Ni 0.098	unspecified	[1] Zhou 2020	Table II, p. 4, row 1 report
Phase composition	1373.15	bcc(Nb) + (Co,Ni)Nb bcc(Nb): Co 0.03, Nb 0.959, Ni 0.011; (Co,Ni)Nb: Co 0.229, Nb 0.555, Ni 0.216	unspecified	[1] Zhou 2020	Table II, p. 4, row 2 report
Phase composition	1373.15	bcc(Nb) + (Co,Ni)Nb bcc(Nb): Co 0.002, Nb 0.966, Ni 0.032; (Co,Ni)Nb: Co 0.074, Nb 0.558, Ni 0.368	unspecified	[1] Zhou 2020	Table II, p. 4, row 3 report
Phase composition	1373.15	λ2 λ2: Co 0.607, Nb 0.284, Ni 0.109	unspecified	[1] Zhou 2020	Table II, p. 4, row 12 report
Phase composition	1373.15	λ2 λ2: Co 0.652, Nb 0.284, Ni 0.064	unspecified	[1] Zhou 2020	Table II, p. 4, row 11 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.563, Nb 0.28, Ni 0.157; τ: Co 0.49, Nb 0.243, Ni 0.267	unspecified	[1] Zhou 2020	Table II, p. 4, row 13 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.442, Nb 0.305, Ni 0.253; τ: Co 0.345, Nb 0.257, Ni 0.398	unspecified	[1] Zhou 2020	Table II, p. 4, row 16 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.496, Nb 0.295, Ni 0.209; τ: Co 0.396, Nb 0.249, Ni 0.355	unspecified	[1] Zhou 2020	Table II, p. 4, row 15 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.393, Nb 0.32, Ni 0.287; τ: Co 0.305, Nb 0.253, Ni 0.442	unspecified	[1] Zhou 2020	Table II, p. 4, row 17 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.332, Nb 0.331, Ni 0.337; τ: Co 0.244, Nb 0.258, Ni 0.498	unspecified	[1] Zhou 2020	Table II, p. 4, row 18 report
Phase composition	1373.15	λ2 + τ λ2: Co 0.52, Nb 0.287, Ni 0.193; τ: Co 0.441, Nb 0.255, Ni 0.304	unspecified	[1] Zhou 2020	Table II, p. 4, row 14 report
Phase composition	1373.15	λ3 + fcc(Co,Ni) λ3: Co 0.76, Nb 0.24, Ni 0; fcc(Co,Ni): Co 0.961, Nb 0.039, Ni 0	unspecified	[1] Zhou 2020	Table II, p. 4, row 22 report
Phase composition	1373.15	τ τ: Co 0.309, Nb 0.233, Ni 0.458	unspecified	[1] Zhou 2020	Table II, p. 4, row 31 report
Phase composition	1373.15	τ τ: Co 0.21, Nb 0.237, Ni 0.553	unspecified	[1] Zhou 2020	Table II, p. 4, row 33 report
Phase composition	1373.15	τ τ: Co 0.398, Nb 0.238, Ni 0.364	unspecified	[1] Zhou 2020	Table II, p. 4, row 29 report
Phase composition	1373.15	τ τ: Co 0.503, Nb 0.24, Ni 0.257	unspecified	[1] Zhou 2020	Table II, p. 4, row 27 report
Phase composition	1373.15	τ τ: Co 0.265, Nb 0.235, Ni 0.5	unspecified	[1] Zhou 2020	Table II, p. 4, row 32 report
Phase composition	1373.15	τ τ: Co 0.356, Nb 0.237, Ni 0.407	unspecified	[1] Zhou 2020	Table II, p. 4, row 30 report
Phase composition	1373.15	τ τ: Co 0.539, Nb 0.245, Ni 0.216	unspecified	[1] Zhou 2020	Table II, p. 4, row 26 report
Phase composition	1373.15	τ τ: Co 0.469, Nb 0.235, Ni 0.296	unspecified	[1] Zhou 2020	Table II, p. 4, row 28 report
Phase composition	1373.15	τ + Ni3Nb τ: Co 0.18, Nb 0.244, Ni 0.576; Ni3Nb: Co 0.14, Nb 0.235, Ni 0.625	unspecified	[1] Zhou 2020	Table II, p. 4, row 34 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.233, Nb 0.22, Ni 0.547; fcc(Co,Ni): Co 0.304, Nb 0.105, Ni 0.591	unspecified	[1] Zhou 2020	Table II, p. 4, row 46 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.471, Nb 0.22, Ni 0.309; fcc(Co,Ni): Co 0.584, Nb 0.072, Ni 0.344	unspecified	[1] Zhou 2020	Table II, p. 4, row 43 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.342, Nb 0.222, Ni 0.436; fcc(Co,Ni): Co 0.438, Nb 0.081, Ni 0.481	unspecified	[1] Zhou 2020	Table II, p. 4, row 44 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.195, Nb 0.221, Ni 0.584; fcc(Co,Ni): Co 0.24, Nb 0.11, Ni 0.65	unspecified	[1] Zhou 2020	Table II, p. 4, row 47 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.577, Nb 0.229, Ni 0.194; fcc(Co,Ni): Co 0.727, Nb 0.057, Ni 0.216	unspecified	[1] Zhou 2020	Table II, p. 4, row 40 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.487, Nb 0.223, Ni 0.29; fcc(Co,Ni): Co 0.618, Nb 0.064, Ni 0.318	unspecified	[1] Zhou 2020	Table II, p. 4, row 42 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.543, Nb 0.226, Ni 0.231; fcc(Co,Ni): Co 0.676, Nb 0.052, Ni 0.272	unspecified	[1] Zhou 2020	Table II, p. 4, row 41 report
Phase composition	1373.15	τ + fcc(Co,Ni) τ: Co 0.285, Nb 0.222, Ni 0.493; fcc(Co,Ni): Co 0.388, Nb 0.089, Ni 0.523	unspecified	[1] Zhou 2020	Table II, p. 4, row 45 report

Crystal structure (25)

Crystal structure, Co–Nb–Ni system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	4.5445 Å	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
Lattice a	5.1932 Å	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
Lattice a	5.1975 Å	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report
Lattice b	8.1949 Å	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
Lattice b	5.1932 Å	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
Lattice b	5.1975 Å	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report
Lattice c	6.1644 Å	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
Lattice c	4.194 Å	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
Lattice c	4.1915 Å	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report
Molar volume printed: V0	12.73 Å3/atom	0	(Co,Ni)Nb	DFT	[1] Zhou 2020	Table V, p. 12, row 11 report
Molar volume printed: V0	13.63 Å3/atom	0	(Co,Ni)Nb alloy: Nb 0.461538, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 13 report
Molar volume printed: V0	13.35 Å3/atom	0	(Co,Ni)Nb alloy: Nb 0.384615, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 12 report
Molar volume printed: V0	14.23 Å3/atom	0	(Co,Ni)Nb alloy: Nb 0.538462, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 14 report
Molar volume printed: V0	12.71 Å3/atom	0	λ1 alloy: Nb 0.333333, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 7 report
Molar volume printed: V0	12.64 Å3/atom	0	λ2 alloy: Nb 0.333333, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 6 report
Molar volume printed: V0	12.66 Å3/atom	0	λ3 alloy: Nb 0.333333, Ni 0	DFT	[1] Zhou 2020	Table V, p. 12, row 5 report
lattice alpha	90 deg	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
lattice alpha	90 deg	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
lattice alpha	90 deg	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report
lattice beta	109.4 deg	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
lattice beta	90 deg	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
lattice beta	90 deg	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report
lattice gamma	90 deg	298.15	UNKNOWN alloy: Co 0.61, Nb 0.23, Ni 0.16	unspecified	[1] Zhou 2020	Table III, p. 9, row 1 report
lattice gamma	120 deg	298.15	UNKNOWN alloy: Co 0.4, Nb 0.24, Ni 0.36	unspecified	[1] Zhou 2020	Table III, p. 9, row 3 report
lattice gamma	120 deg	298.15	UNKNOWN alloy: Co 0.51, Nb 0.23, Ni 0.26	unspecified	[1] Zhou 2020	Table III, p. 9, row 2 report

Sources

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

Chenyang Zhou, Cuiping Guo, Jingbo Li, Changrong Li, Zhenmin Du, Key Experiments and Thermodynamic Description of the Co-Nb-Ni System, Metall Mater Trans A 51, 5892-5911 (2020). doi:10.1007/s11661-020-05963-2

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 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_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}
}