C–V system

40 accepted literature values from 2 paper(s) (experimental 22, model 15, unspecified 3); 0 calculated phase diagram(s). 4 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · phases (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	22
model	15
unspecified	3

Accepted values by property group
Property group	Values
invariant reaction	23
phase transition	12
phase equilibrium	4
crystal structure	1

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull VC-06Hu · CALPHAD hull VC-91Hua-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the C–V system (23)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
3073	congruent melting: VCx <-> liquid	VCx: C 0.475	experimental	[1] Hu 2006 cites Tretyachenko 1966	Table 2, p. 3, row 19 report
2931	congruent melting: VCx <-> liquid	VCx: C 0.433	model	[1] Hu 2006	Table 2, p. 3, row 20 report
2923	Liquid <-> VCx + graphite	Liquid: C 0.46	experimental	[1] Hu 2006 cites Storms 1962 doi	Table 2, p. 3, row 21 report
2921	congruent melting: VCx <-> liquid	VCx: C 0.43	experimental	[1] Hu 2006 cites Storms 1962 doi	Table 2, p. 3, row 18 report
2898	Liquid <-> VCx + graphite	Liquid: C 0.46; VCx: C 0.495	experimental	[1] Hu 2006 cites Rudy 1968	Table 2, p. 3, row 22 report
2879	Liquid <-> VCx + graphite	Liquid: C 0.452; VCx: C 0.495	model	[1] Hu 2006	Table 2, p. 3, row 23 report
2466	Liquid + VCx <-> V2C	Liquid: C 0.258; VCx: C 0.371; V2C: C 0.325	model	[1] Hu 2006	Table 2, p. 3, row 17 report
2460	Liquid + VCx <-> V2C	Liquid: C 0.28; VCx: C 0.37; V2C: C 0.35	experimental	[1] Hu 2006 cites Rudy 1968	Table 2, p. 3, row 15 report
2438	Liquid + VCx <-> V2C	Liquid: C 0.28; VCx: C 0.37; V2C: C 0.333	experimental	[1] Hu 2006 cites Tretyachenko 1966	Table 2, p. 3, row 16 report
2438	Liquid + VCx <-> V2C	VCx: C 0.375; V2C: C 0.36	experimental	[1] Hu 2006 cites Storms 1962 doi	Table 2, p. 3, row 14 report
2150	V2C + VCx <-> V4C3-x	V2C: C 0.35; V4C3-x: C 0.379	experimental	[1] Hu 2006 cites Wiesenberger 1998 doi	Table 2, p. 3, row 1 report
2149	V2C + VCx <-> V4C3-x	V2C: C 0.333333, V 0.666667; V4C3-x: C 0.379	model	[1] Hu 2006	Table 2, p. 3, row 2 report
1923	Liquid <-> V2C + bcc-(V)	Liquid: C 0.055; V2C: C 0.27; bcc-(V): C 0.15	experimental	[1] Hu 2006 cites Rudy 1968	Table 2, p. 3, row 11 report
1923	Liquid <-> V2C + bcc-(V)	V2C: C 0.3; bcc-(V): C 0.14	experimental	[1] Hu 2006 cites Tretyachenko 1966	Table 2, p. 3, row 12 report
1922	Liquid <-> V2C + bcc-(V)	Liquid: C 0.0378; V2C: C 0.293; bcc-(V): C 0.133	model	[1] Hu 2006	Table 2, p. 3, row 13 report
1903	Liquid <-> V2C + bcc-(V)	Liquid: C 0.087; V2C: C 0.25	experimental	[1] Hu 2006 cites Storms 1962 doi	Table 2, p. 3, row 10 report
1540	V4C3-x <-> V2C + VCx	V4C3-x: C 0.379; V2C: C 0.35; VCx: C 0.419	experimental	[1] Hu 2006 cites Wiesenberger 1998 doi	Table 2, p. 3, row 3 report
1535	V4C3-x <-> V2C + VCx	V4C3-x: C 0.379; V2C: C 0.333; VCx: C 0.421	model	[1] Hu 2006	Table 2, p. 3, row 4 report
1397	polymorphic: V8C7 <-> VCx	V8C7: C 0.467	experimental	[1] Hu 2006 cites Shacklette 1973 doi	Table 2, p. 3, row 6 report
1385	polymorphic: V8C7 <-> VCx	V8C7: C 0.467	unspecified	[1] Hu 2006 cites Emmons 1983 doi	Table 2, p. 3, row 5 report
1383	polymorphic: V8C7 <-> VCx	V8C7: C 0.467	model	[1] Hu 2006	Table 2, p. 3, row 7 report
1331	VCx <-> V6C5 + V8C7	VCx: C 0.46; V6C5: C 0.454545, V 0.545455; V8C7: C 0.467	unspecified	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 2, p. 3, row 8 report
1329	VCx <-> V6C5 + V8C7	VCx: C 0.459; V6C5: C 0.451; V8C7: C 0.467	model	[1] Hu 2006	Table 2, p. 3, row 9 report

Other properties

Phase transition (12)

Phase transition, C–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1329 K	1329	eutectic: VCx <-> V6C5 + V8C7 alloy: V 0.545455	model	[1] Hu 2006	Table 1, p. 2, row 28 report
Phase transition	1331 K	1331	eutectic: VCx <-> V6C5 + V8C7 alloy: V 0.545455	experimental	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 27 report
Phase transition	1366 K	1366	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	model	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 22 report
Phase transition	1380 K	1380	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	model	[1] Hu 2006	Table 1, p. 2, row 24 report
Phase transition	1428 K	1428	order-disorder: VCx + V6C5 <-> V6C5 alloy: V 0.545455	model	[1] Hu 2006	Table 1, p. 2, row 26 report
Phase transition	1430 K	1430	order-disorder: VCx + V6C5 <-> V6C5 alloy: V 0.545455	experimental	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 25 report
Phase transition	1440 K	1440	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	experimental	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 19 report
Phase transition	1448 K	1448	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	model	[1] Hu 2006	Table 1, p. 2, row 23 report
Phase transition	1450 K	1450	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	model	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 21 report
Phase transition	1457 K	1457	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	experimental	[1] Hu 2006 cites Emmons 1983 doi	Table 1, p. 2, row 20 report
Phase transition	1473 K	1473	order-disorder: VCx <-> V6C5 + VCx alloy: V 0.545455	experimental	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 18 report
Phase transition	2183 K	2183	bcc	experimental	[1] Hu 2006	p. 4 report	However, in order to avoid a kink in CP due to the change in the description of ◦ Gbcc V at the melting point (2183 K), it is decided to replace ◦ Gbcc V in Eqs. (7) and (8) with a quantity ◦ Ghyp , which is identical to ◦ Gbcc except that the expression for V V φ 790 to 2183 K is used extensively up to 4000 K [2].

Phase equilibrium (4)

Phase equilibrium, C–V system
Property	T (K)	Phases / composition	Class	Source	Location
Phase composition	1358	congruent melting: V8C7 <-> VCx liquid: V 0.533333; V8C7: V 0.533333	experimental	[1] Hu 2006 cites Lipatnikov 1999 doi	Table 1, p. 2, row 29 report
Phase composition	1383	congruent melting: V8C7 <-> VCx liquid: V 0.533333; V8C7: V 0.533333	model	[1] Hu 2006	Table 1, p. 2, row 32 report
Phase composition	1385	congruent melting: V8C7 <-> VCx liquid: V 0.533333; V8C7: V 0.533333	experimental	[1] Hu 2006 cites Emmons 1983 doi	Table 1, p. 2, row 30 report
Phase composition	1397	congruent melting: V8C7 <-> VCx liquid: V 0.533333; V8C7: V 0.533333	experimental	[1] Hu 2006 cites Shacklette 1973 doi	Table 1, p. 2, row 31 report

Crystal structure (1)

Crystal structure, C–V system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
volume printed: Ω	9.058 unknown		η-VC alloy: V 0.5	unspecified	[2] Bratberg 2002	Table 3, p. 7, row 2 report

Sources

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

Jincheng Hu, Changrong Li, Fuming Wang, Weijing Zhang, Thermodynamic re-assessment of the V–C system, Journal of Alloys and Compounds 421, 120-127 (2006). doi:10.1016/j.jallcom.2005.11.033
Johan Bratberg, Karin Frisk, A thermodynamic analysis of the Mo-V and Mo-V-C system, Calphad 26, 459-476 (2002). doi:10.1016/s0364-5916(02)00057-3

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-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); 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); 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. 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_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}
}