Co–V system

113 accepted literature values from 4 paper(s) (experimental 61, model 21, DFT 25, unspecified 6); 6 calculated phase diagram(s). 16 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 (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	61
model	21
DFT	25
unspecified	6

Accepted values by property group
Property group	Values
invariant reaction	30
phase equilibrium	6
formation	75
mixing / partial	2

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
CoV-03Bra-LB.tdb	J. Bratberg, B. Sundman, J. Phase Equilib., 24, 495-503(2003). doi:10.1361/105497103772084534	`9989e5b98aef44c67ea22b635cd1c710a06d815cb89127f570e3f6154dac5eb7`	viewer · TDB · JSON
CoV-04Hua.tdb	S. Huang, L. Li, O. Van der Biest, J. Vleugels, J. Alloys Compd., 385, 114-18(2004). doi:10.1016/j.jallcom.2004.04.131	`dd5238a73f44104a905cad4b8cfcd80f3bc7c6c4425c88218d6ee0d57f5076a2`	viewer · TDB · JSON
CoV-15Wan.tdb	C. Wang, C. Zhao, Y. Lu, T. Li, D. Peng, J. Shi, X. Liu, Mater. Chem. Phys., 162, 555-60(2015). doi:10.1016/j.matchemphys.2015.06.028	`806d7a1de1b823d0674861c13ba0934f60c89b00e1bc7703800d0e90fbd696ee`	viewer · TDB · JSON
CoV-20Wan-mod.tdb	P. Wang, T. Hammerschmidt, U.R. Kattner, G.B. Olson, Calphad, 68, 101729(2020). doi:10.1016/j.calphad.2019.101729	`80e65f032fcdd04ed7434bcfcfc3484a72315feb640322dca3f7750febbb8618`	viewer · TDB · JSON
CoV-20Wan.tdb	P. Wang, T. Hammerschmidt, U.R. Kattner, G.B. Olson, Calphad, 68, 101729(2020). doi:10.1016/j.calphad.2019.101729	`37a72b9c68686fd928fae8526afec3c7ad341e36a208ffa0e06e483dc7f79b9b`	viewer · TDB · JSON
CoV-24Sun.tdb	J. Sun, C. Guo, C. Li, Z. Du, Calphad, 87, 102762(2024). doi:10.1016/j.calphad.2024.102762	`df9c23b303bbb880966762040efe0a7c05a448dcaab801df747a2da5fa13dbea`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CoV-03Bra-LB.tdb	1688.62	LIQUID (x(V) 0.66584) + SIGMA_D8B (x(V) 0.68086) + BCC_A2 (x(V) 0.80958)
CoV-03Bra-LB.tdb	1532.67	FCC_4SL (x(V) 0.32891) + LIQUID (x(V) 0.40972) + SIGMA_D8B (x(V) 0.48343)
CoV-03Bra-LB.tdb	1532.67	FCC_A1 (x(V) 0.32891) + LIQUID (x(V) 0.40972) + SIGMA_D8B (x(V) 0.48343)
CoV-03Bra-LB.tdb	1299.94	HCP_4SL (x(V) 0.26268) + FCC_4SL (x(V) 0.31939) + SIGMA_D8B (x(V) 0.46128)
CoV-03Bra-LB.tdb	1299.94	HCP_4SL (x(V) 0.26268) + FCC_A1 (x(V) 0.31939) + SIGMA_D8B (x(V) 0.46128)
CoV-03Bra-LB.tdb	1299.94	HCP_4SL (x(V) 0.26268) + FCC_4SL (x(V) 0.31939) + SIGMA_D8B (x(V) 0.46128)
CoV-03Bra-LB.tdb	1299.94	HCP_4SL (x(V) 0.26268) + FCC_4SL (x(V) 0.31939) + SIGMA_D8B (x(V) 0.46128)
CoV-03Bra-LB.tdb	1299.94	HCP_4SL (x(V) 0.26268) + FCC_A1 (x(V) 0.31939) + SIGMA_D8B (x(V) 0.46128)
CoV-03Bra-LB.tdb	1297.17	SIGMA_D8B (x(V) 0.69016) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.87593)
CoV-03Bra-LB.tdb	1297.17	SIGMA_D8B (x(V) 0.69016) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.87595)
CoV-03Bra-LB.tdb	988.78	FCC_4SL (x(V) 0.04657) + FCC_4SL#2 (x(V) 0.08977) + HCP_4SL (x(V) 0.18227)
CoV-03Bra-LB.tdb	988.78	FCC_A1 (x(V) 0.04657) + FCC_4SL (x(V) 0.08977) + HCP_4SL (x(V) 0.18227)
CoV-03Bra-LB.tdb	704.6	FCC_4SL (x(V) 0.01611) + HCP_A3 (x(V) 0.01701) + HCP_4SL (x(V) 0.2343)
CoV-03Bra-LB.tdb	704.6	FCC_A1 (x(V) 0.01611) + HCP_A3 (x(V) 0.01701) + HCP_4SL (x(V) 0.2343)
CoV-03Bra-LB.tdb	704.6	FCC_A1 (x(V) 0.01611) + HCP_4SL (x(V) 0.01701) + HCP_4SL#2 (x(V) 0.2343)
CoV-03Bra-LB.tdb	694.99	FCC_A1 (x(V) 0) + HCP_4SL (x(V) 0) + HCP_A3 (x(V) 0)
CoV-03Bra-LB.tdb	516.52	HCP_4SL (x(V) 0.2511) + SIGMA_D8B (x(V) 0.62668) + COV3_A15 (x(V) 0.75)
CoV-03Bra-LB.tdb	516.52	HCP_4SL (x(V) 0.2511) + SIGMA_D8B (x(V) 0.6267) + COV3_A15 (x(V) 0.75)
CoV-03Bra-LB.tdb	516.52	HCP_4SL (x(V) 0.2511) + SIGMA_D8B (x(V) 0.62668) + COV3_A15 (x(V) 0.75)
CoV-03Bra-LB.tdb	516.52	HCP_4SL (x(V) 0.2511) + SIGMA_D8B (x(V) 0.6267) + COV3_A15 (x(V) 0.75)
CoV-03Bra-LB.tdb	516.52	HCP_4SL (x(V) 0.2511) + SIGMA_D8B (x(V) 0.6267) + COV3_A15 (x(V) 0.75)
CoV-04Hua.tdb	1691.05	LIQUID (x(V) 0.64787) + SIGMA_OLD (x(V) 0.66981) + BCC_A2 (x(V) 0.77905)
CoV-04Hua.tdb	1519.08	FCC_A1 (x(V) 0.33772) + LIQUID (x(V) 0.41197) + SIGMA_OLD (x(V) 0.47303)
CoV-04Hua.tdb	1299.01	SIGMA_OLD (x(V) 0.68738) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.83136)
CoV-04Hua.tdb	1299.01	SIGMA_OLD (x(V) 0.68738) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.83138)
CoV-04Hua.tdb	1276.35	CO3V (x(V) 0.25) + FCC_A1 (x(V) 0.31745) + SIGMA_OLD (x(V) 0.41425)
CoV-04Hua.tdb	1276.35	CO3V (x(V) 0.25) + FCC_A1 (x(V) 0.31744) + SIGMA_OLD (x(V) 0.41422)
CoV-15Wan.tdb	1694.72	LIQUID (x(V) 0.65323) + SIGMA_OLD (x(V) 0.66446) + BCC_A2 (x(V) 0.77991)
CoV-15Wan.tdb	1520.99	FCC_A1 (x(V) 0.33201) + LIQUID (x(V) 0.41648) + SIGMA_OLD (x(V) 0.47857)
CoV-15Wan.tdb	1299.33	CO3V (x(V) 0.30516) + FCC_A1 (x(V) 0.33325) + SIGMA_OLD (x(V) 0.45544)
CoV-15Wan.tdb	1298.01	SIGMA_OLD (x(V) 0.68899) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.90405)
CoV-15Wan.tdb	1298.01	SIGMA_OLD (x(V) 0.689) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.90411)
CoV-15Wan.tdb	991.55	FCC_A1#2 (x(V) 0.0534) + FCC_A1 (x(V) 0.11109) + CO3V (x(V) 0.20841)
CoV-15Wan.tdb	684.51	HCP_A3 (x(V) 0.02246) + FCC_A1 (x(V) 0.02686) + CO3V (x(V) 0.20409)
CoV-20Wan-mod.tdb	1696.17	LIQUID (x(V) 0.6599) + SIGMA_D8B (x(V) 0.6685) + BCC_A2 (x(V) 0.78211)
CoV-20Wan-mod.tdb	1517.88	FCC_4SL (x(V) 0.36305) + LIQUID (x(V) 0.43092) + SIGMA_D8B (x(V) 0.47359)
CoV-20Wan-mod.tdb	1517.88	FCC_A1 (x(V) 0.36305) + LIQUID (x(V) 0.43092) + SIGMA_D8B (x(V) 0.47359)
CoV-20Wan-mod.tdb	1307.7	SIGMA_D8B (x(V) 0.67242) + COV3_A15 (x(V) 0.75454) + BCC_A2 (x(V) 0.89667)
CoV-20Wan-mod.tdb	1282.35	CO3V (x(V) 0.30968) + FCC_A1 (x(V) 0.33543) + SIGMA_D8B (x(V) 0.41698)
CoV-20Wan-mod.tdb	1282.35	CO3V (x(V) 0.30968) + FCC_4SL (x(V) 0.33543) + SIGMA_D8B (x(V) 0.41698)
CoV-20Wan-mod.tdb	1004.82	FCC_4SL (x(V) 0.04786) + FCC_A1 (x(V) 0.09948) + CO3V (x(V) 0.25014)
CoV-20Wan-mod.tdb	1004.82	FCC_4SL#2 (x(V) 0.04786) + FCC_4SL (x(V) 0.09948) + CO3V (x(V) 0.25014)
CoV-20Wan-mod.tdb	666.36	HCP_A3 (x(V) 0.00125) + FCC_4SL (x(V) 0.00451) + CO3V (x(V) 0.25)
CoV-20Wan-mod.tdb	666.36	HCP_A3 (x(V) 0.00125) + FCC_4SL (x(V) 0.00449) + CO3V (x(V) 0.25)
CoV-20Wan.tdb	1695.53	LIQUID (x(V) 0.65955) + SIGMA_D8B (x(V) 0.66896) + BCC_A2 (x(V) 0.78154)
CoV-20Wan.tdb	1517.78	FCC_4SL (x(V) 0.36312) + LIQUID (x(V) 0.431) + SIGMA_D8B (x(V) 0.46073)
CoV-20Wan.tdb	1296.74	SIGMA_D8B (x(V) 0.6727) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.89925)
CoV-20Wan.tdb	1296.74	SIGMA_D8B (x(V) 0.6727) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.89929)
CoV-20Wan.tdb	1281.56	CO3V (x(V) 0.31348) + FCC_4SL (x(V) 0.33897) + SIGMA_D8B (x(V) 0.42335)
CoV-20Wan.tdb	1004.83	FCC_4SL#2 (x(V) 0.04786) + FCC_4SL (x(V) 0.09948) + CO3V (x(V) 0.25014)
CoV-20Wan.tdb	666.36	HCP_A3 (x(V) 0.00125) + FCC_4SL (x(V) 0.00451) + CO3V (x(V) 0.25)
CoV-20Wan.tdb	666.36	HCP_A3 (x(V) 0.00125) + FCC_4SL (x(V) 0.00449) + CO3V (x(V) 0.25)
CoV-24Sun.tdb	1687.76	LIQUID (x(V) 0.63712) + SIGMA_D8B (x(V) 0.66745) + BCC_A2 (x(V) 0.76515)
CoV-24Sun.tdb	1518.97	FCC_A1 (x(V) 0.32795) + LIQUID (x(V) 0.40677) + SIGMA_D8B (x(V) 0.47035)
CoV-24Sun.tdb	1301.77	CO3V (x(V) 0.30116) + FCC_A1 (x(V) 0.32455) + SIGMA_D8B (x(V) 0.45404)
CoV-24Sun.tdb	1300.34	SIGMA_D8B (x(V) 0.71839) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.92874)
CoV-24Sun.tdb	1300.34	SIGMA_D8B (x(V) 0.7184) + COV3_A15 (x(V) 0.75) + BCC_A2 (x(V) 0.92879)
CoV-24Sun.tdb	992.74	FCC_A1#2 (x(V) 0.05355) + FCC_A1 (x(V) 0.11039) + CO3V (x(V) 0.2099)
CoV-24Sun.tdb	683.42	HCP_A3 (x(V) 0.02203) + FCC_A1 (x(V) 0.02637) + CO3V (x(V) 0.20788)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CoV-03Bra-LB · CALPHAD hull CoV-04Hua · CALPHAD hull CoV-15Wan · CALPHAD hull CoV-20Wan-mod · CALPHAD hull CoV-20Wan

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–V system (30)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2183.15	congruent melting: L -> (V)	(V): V 1	experimental	[1] Bratberg 2003 cites Smith 1993	Table 1, p. 4, row 12 report
1768.15	congruent melting: L -> (αpCo)	(αpCo): V 0	experimental	[1] Bratberg 2003 cites Hume-Rothery 1961	Table 1, p. 4, row 3 report
1695.15	peritectic: L + (V) ↔ σ	L: V 0.653; (V): V 0.78; σ: V 0.664	model	[2] Wang 2015	Table 4, p. 4, row 12 report
1695.15	Liquid + bcc -> sigma	L: V 0.66; bcc: V 0.78; sigma: V 0.67	experimental	[3] Huang 2004 cites Greenfield 1954	Table 2, p. 4, row 6 report
1695.15	peritectic: L + (V) -> σ	L: V 0.66; (V): V 0.78; σ: V 0.67	experimental	[1] Bratberg 2003 cites Koster 1955	Table 1, p. 4, row 10 report
1695.15	peritectic: L + (V) ↔ σ	L: V 0.66; (V): V 0.78; σ: V 0.67	unspecified	[2] Wang 2015 cites Ko	Table 4, p. 4, row 11 report
1691.15	Liquid + bcc -> sigma	L: V 0.648; bcc: V 0.779; sigma: V 0.6698	model	[3] Huang 2004	Table 2, p. 4, row 5 report
1521.15	eutectoid: L -> (αpCo) + σ	L: V 0.415; (αpCo): V 0.35; σ: V 0.45	experimental	[1] Bratberg 2003 cites Koster 1955	Table 1, p. 4, row 9 report
1521.15	eutectic: Liquid -> fcc + sigma	L: V 0.415; fcc: V 0.35; sigma: V 0.45	experimental	[3] Huang 2004 cites Koster 1955 doi	Table 2, p. 4, row 2 report
1521.15	eutectoid: L ↔ (αpCo) + σ	L: V 0.332; (αpCo): V 0.416; σ: V 0.478	model	[2] Wang 2015	Table 4, p. 4, row 10 report
1521.15	eutectoid: L ↔ (αpCo) + σ	L: V 0.35; (αpCo): V 0.415; σ: V 0.45	unspecified	[2] Wang 2015 cites Ko	Table 4, p. 4, row 9 report
1519.15	eutectic: Liquid -> fcc + sigma	L: V 0.412; fcc: V 0.337; sigma: V 0.473	model	[3] Huang 2004	Table 2, p. 4, row 1 report
1396.15	magnetic: (αfCo) -> (αpCo)	(αpCo): V 0	experimental	[1] Bratberg 2003 cites Fernandez 2003	Table 1, p. 4, row 2 report
1343.15	other: Co3V ↔ (αpCo)	Co3V: V 0.285; (αpCo): V 0.285	model	[2] Wang 2015	Table 4, p. 4, row 6 report
1343.15	other: Co3V ↔ (αpCo)	Co3V: V 0.25; (αpCo): V 0.25	unspecified	[2] Wang 2015 cites Ko	Table 4, p. 4, row 5 report
1343.15	other: Co3V (fcc) -> (αpCo)	Co3V (fcc): Co 0.75, V 0.25; (αpCo): V 0.25	experimental	[1] Bratberg 2003 cites Koster 1955	Table 1, p. 4, row 7 report
1318.15	polymorphic: Co3V (hex) -> (Co3V(fcc)	Co3V (hex): Co 0.75, V 0.25	experimental	[1] Bratberg 2003 cites Smith 1993	Table 1, p. 4, row 6 report
1299.15	eutectoid: (αpCo) ↔ Co3V + σ	(αpCo): V 0.32; Co3V: V 0.34; σ: V 0.45	unspecified	[2] Wang 2015 cites Ko	Table 4, p. 4, row 7 report
1299.15	eutectoid: (αpCo) -> Co3V + σ	(αpCo): V 0.34; Co3V: V 0.32; σ: V 0.45	experimental	[1] Bratberg 2003 cites Koster 1955	Table 1, p. 4, row 8 report
1299.15	Sigma + bcc -> CoM3	Sigma: V 0.6874; bcc: V 0.8314; CoM3: V 0.75	model	[3] Huang 2004	Table 2, p. 4, row 7 report
1299.15	eutectoid: (αpCo) ↔ Co3V + σ	(αpCo): V 0.305; Co3V: V 0.333; σ: V 0.455	model	[2] Wang 2015	Table 4, p. 4, row 8 report
1299.15	fcc -> Co3M + sigma	fcc: V 0.34; Co3M: V 0.25; sigma: V 0.45	experimental	[3] Huang 2004 cites Koster 1955 doi	Table 2, p. 4, row 4 report
1298.15	Sigma + bcc -> CoM3	Sigma: V 0.69; bcc: V 0.8; CoM3: V 0.75	experimental	[3] Huang 2004 cites Greenfield 1954	Table 2, p. 4, row 8 report
1298.15	peritectoid: σ + (V) ↔ CoV3	σ: V 0.71; (V): V 0.84; CoV3: V 0.75	experimental	[2] Wang 2015 cites Zegler 1963	Table 4, p. 4, row 13 report
1298.15	peritectoid: σ + (V) -> CoV3	σ: V 0.71; (V): V 0.84; CoV3: V 0.75	experimental	[1] Bratberg 2003 cites Zegler 1963	Table 1, p. 4, row 11 report
1298.15	peritectoid: σ + (V) ↔ CoV3	σ: V 0.689; (V): V 0.904; CoV3: V 0.75	model	[2] Wang 2015	Table 4, p. 4, row 14 report
1276.15	fcc -> Co3M + sigma	fcc: V 0.3174; Co3M: V 0.25; sigma: V 0.4143	model	[3] Huang 2004	Table 2, p. 4, row 3 report
991.15	eutectoid: (αpCo) ↔ (αfCo) + Co3V	(αpCo): V 0.053; (αfCo): V 0.111; Co3V: V 0.208	model	[2] Wang 2015	Table 4, p. 4, row 4 report
695.15	polymorphic: (εCo) -> (αfCo)	(αfCo): V 0	experimental	[1] Bratberg 2003 cites Nishizawa 1983	Table 1, p. 4, row 1 report
671.15	eutectoid: (αfCo) ↔ (εCo) + Co3V	(αfCo): V 0.022; (εCo): V 0.027; Co3V: V 0.204	model	[2] Wang 2015	Table 4, p. 4, row 2 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, Co–V system (55)
Phase	Value	T (K)	Class	Source	Location
Co3V	-16.3103 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 8 report
Co3V	-7.2976 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 11 report
Co3V	-7.1374 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 7 report
Co3V	-7.0055 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 10 report
Co3V	-1.3604 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 4 report
Co3V	-6.000e-4 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 3 report
Co3V	1.1026 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 1 report
Co3V	1.7914 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 6 report
Co3V	4.4217 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 12 report
Co3V	4.5149 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 5 report
Co3V	7.0017 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 9 report
Co3V	8.4967 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 16 report
Co3V	9.8872 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 14 report
Co3V	13.9387 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 13 report
Co3V	17.3899 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 15 report
Co3V	23.2844 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 2 report
CoV3	-18.9595 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 19 report
CoV3	-2.6519 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 18 report
CoV3	4.642 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 20 report
CoV3	9.1849 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 17 report
bcc	-2.845 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 17 report
bcc	-2.845 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 9 report
bcc	-1.637 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 18 report
bcc	-1.445 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 19 report
bcc	-1.445 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 10 report
bcc	-0.876 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 20 report
fcc	-9.75 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 7 report
fcc	-9.75 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 4 report
fcc	-9.04 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 3 report
fcc	-9.04 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 5 report
fcc	-8.861 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 8 report
fcc	-8.651 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 6 report
fcc	-7.071 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 4 report
fcc	-7.03 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 3 report
fcc	-7.03 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 2 report
fcc	-4.1 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 1 report
fcc	-4.1 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 1 report
fcc	-3.821 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 2 report
σ	-11.225 kJ/mol-atom ± 0.85	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 11 report
σ	-11.225 kJ/mol-atom ± 0.85	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 6 report
σ	-11.005 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 13 report
σ	-11.005 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 7 report
σ	-10.88 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 9 report
σ	-10.88 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 5 report
σ	-10.87 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 12 report
σ	-10.818 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 14 report
σ	-10.805 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 10 report
σ	-10.365 kJ/mol-atom	1473	model	[1] Bratberg 2003	Table 3, p. 6, row 16 report
σ	-10 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 8 report
σ	-10 kJ/mol-atom	1473	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 3, p. 6, row 15 report
σ	-1.9192 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 24 report
σ	-0.2289 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 25 report
σ	0.7562 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 22 report
σ	1.5473 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 23 report
σ	5.6217 kJ/mol-atom	0	DFT	[4] Wang 2020	Table 2, p. 20, row 21 report

Other properties

Phase equilibrium (6)

Phase equilibrium, Co–V system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	973.15	(αfCo) + Co3V (αfCo): Co 0.9439, V 0.0561; Co3V: Co 0.781, V 0.219	experimental	[2] Wang 2015	Table 2, p. 3, row 6 report
Phase composition	1073.15	(αfCo) + (αpCo) (αfCo): Co 0.951, V 0.049; (αpCo): Co 0.9, V 0.1	experimental	[2] Wang 2015	Table 2, p. 3, row 1 report
Phase composition	1073.15	(αpCo) + Co3V (αpCo): Co 0.848, V 0.152; Co3V: Co 0.792, V 0.208	experimental	[2] Wang 2015	Table 2, p. 3, row 2 report
Phase composition	1073.15	Co3V + σ Co3V: Co 0.683, V 0.317; σ: Co 0.545, V 0.455	experimental	[2] Wang 2015	Table 2, p. 3, row 3 report
Phase composition	1073.15	CoV3 + (Cr, V) CoV3: Co 0.244, V 0.756; (Cr, V): Co 0.037, V 0.963	experimental	[2] Wang 2015	Table 2, p. 3, row 5 report
Phase composition	1073.15	σ + CoV3 σ: Co 0.302, V 0.698; CoV3: Co 0.244, V 0.756	experimental	[2] Wang 2015	Table 2, p. 3, row 4 report

Formation (20)

Formation, Co–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy of formation printed: Entropy of Formation	1.07 unknown	1473	bcc alloy: Co 0.05, V 0.95	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 10 report
Entropy of formation printed: Entropy of Formation	1.57 unknown	1473	bcc alloy: Co 0.1, V 0.9	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 9 report
Entropy of formation printed: Entropy of Formation	1.81 unknown	1473	fcc alloy: Co 0.7, V 0.3	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 3 report
Entropy of formation printed: Entropy of Formation	1.07 unknown	1473	fcc alloy: Co 0.9, V 0.1	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 1 report
Entropy of formation printed: Entropy of Formation	1.52 unknown	1473	fcc alloy: Co 0.8, V 0.2	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 2 report
Entropy of formation printed: Entropy of Formation	1.91 unknown	1473	fcc alloy: Co 0.65, V 0.35	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 4 report
Entropy of formation printed: Entropy of Formation	1.87 unknown	1473	σ alloy: Co 0.35, V 0.65	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 8 report
Entropy of formation printed: Entropy of Formation	1.79 unknown	1473	σ alloy: Co 0.4, V 0.6	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 7 report
Entropy of formation printed: Entropy of Formation	1.96 unknown	1473	σ alloy: Co 0.55, V 0.45	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 5 report
Entropy of formation printed: Entropy of Formation	1.91 unknown ± 2	1473	σ alloy: Co 0.5, V 0.5	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 6 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-3.021 kJ/mol-atom	1473	bcc alloy: Co 0.05, V 0.95	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 10 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-5.158 kJ/mol-atom	1473	bcc alloy: Co 0.1, V 0.9	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 9 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-11.706 kJ/mol-atom	1473	fcc alloy: Co 0.7, V 0.3	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 3 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-5.676 kJ/mol-atom	1473	fcc alloy: Co 0.9, V 0.1	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 1 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-9.279 kJ/mol-atom	1473	fcc alloy: Co 0.8, V 0.2	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 2 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-12.563 kJ/mol-atom	1473	fcc alloy: Co 0.65, V 0.35	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 4 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-12.755 kJ/mol-atom	1473	σ alloy: Co 0.35, V 0.65	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 8 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-13.642 kJ/mol-atom	1473	σ alloy: Co 0.4, V 0.6	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 7 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-13.767 kJ/mol-atom	1473	σ alloy: Co 0.55, V 0.45	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 5 report
Gibbs energy of formation printed: Gibbs Energy of Formation	-14.068 kJ/mol-atom ± 3.8	1473	σ alloy: Co 0.5, V 0.5	experimental	[1] Bratberg 2003 cites Spencer 1976 doi	Table 2, p. 6, row 6 report

Mixing / partial (2)

Mixing / partial, Co–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Gibbs energy of mixing printed: ΔGmag	0 kJ/mol (basis unstated)	298.15	σ alloy: Co 0.866, V 0.134	unspecified	[4] Wang 2020	Table 4, p. 24, row 1 report
Gibbs energy of mixing printed: ΔGmag	-3.849 kJ/mol (basis unstated)	298.15	σ alloy: Co 0.866, V 0.134	unspecified	[4] Wang 2020	Table 4, p. 24, row 2 report

Sources

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

Johan Bratberg, Bo Sundman, A thermodynamic assessment of the Co-V system, JPE 24, 495-503 (2003). doi:10.1361/105497103772084534
Cuiping Wang, Cancan Zhao, Yong Lu, Tian Li, Dongliang Peng, Ji Shi et al., Experimental observation of magnetically induced phase separation and thermodynamic assessment in the Co–V binary system, Materials Chemistry and Physics 162, 555-560 (2015). doi:10.1016/j.matchemphys.2015.06.028
Shuigen Huang, Lin Li, Omer Van der Biest, Jef Vleugels, Thermodynamic assessment of the Co–V and Co–V–C system, Journal of Alloys and Compounds 385, 114-118 (2004). doi:10.1016/j.jallcom.2004.04.131
Peisheng Wang, Thomas Hammerschmidt, Ursula R. Kattner, Gregory B. Olson, Structural stability of Co–V intermetallic phases and thermodynamic description of the Co–V system, Calphad 68, 101729 (2020). doi:10.1016/j.calphad.2019.101729

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}
}