V–Zr system

53 accepted literature values from 3 paper(s) (experimental 23, model 29, unspecified 1); 5 calculated phase diagram(s). 1 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 (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	23
model	29
unspecified	1

Accepted values by property group
Property group	Values
invariant reaction	46
formation	3
mixing / partial	3
crystal structure	1

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
VZr-05Ser.tdb	C. Servant, J. Phase Equilib. Diffus., 26, 39-49(2005). doi:10.1361/15477030522464	`a133e5b6ad447e31172148da46941601f63d9a5e4c5ad459b8b255647e9fdff8`	viewer · TDB · JSON
VZr-12Zha.tdb	X.-S. Zhao, G.-H. Yuan, M.-Y. Yao, Q. Yue, J.-Y. Shen, Calphad, 36, 163-68(2012). doi:10.1016/j.calphad.2011.07.003	`d2ae83ad51b4411a7079fabe7d9f6dd39134ae0b02762c8424939cb7a20e1cdf`	viewer · TDB · JSON
VZr-16Cui-1.tdb	J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016). doi:10.1016/j.calphad.2016.03.008	`89ebe6dfb309eac5bbf30dfd2f9a5b1b912ca00d878de4d3aa6de53da0e65559`	viewer · TDB · JSON
VZr-16Cui-2.tdb	J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016). doi:10.1016/j.calphad.2016.09.003	`54a76005b6cc78622be85539127225d994465acb56822698ba603d47aa5decdd`	viewer · TDB · JSON
VZr-98Kor-LB.tdb	J. Korb, K. Hack, COST 507, Final report round 2, 1998.	`6847bb5a2a797e43b2fa83fe3d3d56a190fcdff8b27883b28901fdde7ee096b0`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
VZr-05Ser.tdb	1586.11	BCC_A2 (x(Zr) 0.04914) + C15_LAVES (x(Zr) 0.33488) + LIQUID (x(Zr) 0.47769)
VZr-05Ser.tdb	1525.2	C15_LAVES (x(Zr) 0.35226) + LIQUID (x(Zr) 0.5611) + BCC_A2 (x(Zr) 0.83063)
VZr-05Ser.tdb	1046.3	C15_LAVES (x(Zr) 0.343) + BCC_A2 (x(Zr) 0.92182) + HCP_A3 (x(Zr) 0.96895)
VZr-12Zha.tdb	1573.17	BCC_A2 (x(Zr) 0.05707) + C15_LAVES (x(Zr) 0.33956) + LIQUID (x(Zr) 0.47903)
VZr-12Zha.tdb	1537.98	C15_LAVES (x(Zr) 0.34345) + LIQUID (x(Zr) 0.54827) + BCC_A2 (x(Zr) 0.83135)
VZr-12Zha.tdb	1050.04	C15_LAVES (x(Zr) 0.34964) + BCC_A2 (x(Zr) 0.92871) + HCP_A3 (x(Zr) 0.99678)
VZr-16Cui-1.tdb	1586.45	BCC_A2 (x(Zr) 0.07853) + C15_LAVES (x(Zr) 0.3354) + LIQUID (x(Zr) 0.41694)
VZr-16Cui-1.tdb	1536.78	C15_LAVES (x(Zr) 0.34811) + LIQUID (x(Zr) 0.54294) + BCC_A2 (x(Zr) 0.82947)
VZr-16Cui-1.tdb	1069.97	C15_LAVES (x(Zr) 0.35) + BCC_A2 (x(Zr) 0.93258) + HCP_A3 (x(Zr) 0.98)
VZr-16Cui-2.tdb	1585.03	BCC_A2 (x(Zr) 0.075) + C15_LAVES (x(Zr) 0.33525) + LIQUID (x(Zr) 0.41998)
VZr-16Cui-2.tdb	1538.04	C15_LAVES (x(Zr) 0.3553) + LIQUID (x(Zr) 0.54001) + BCC_A2 (x(Zr) 0.83349)
VZr-16Cui-2.tdb	1070.16	C15_LAVES (x(Zr) 0.35002) + BCC_A2 (x(Zr) 0.95074) + HCP_A3 (x(Zr) 0.98761)
VZr-98Kor-LB.tdb	1552.75	BCC_A2 (x(Zr) 0.04598) + V2ZR_C15 (x(Zr) 0.33333) + LIQUID (x(Zr) 0.49421)
VZr-98Kor-LB.tdb	1552.75	BCC_A2 (x(Zr) 0.04598) + V2ZR_C15 (x(Zr) 0.33333) + LIQUID (x(Zr) 0.49414)
VZr-98Kor-LB.tdb	1510.2	V2ZR_C15 (x(Zr) 0.33333) + LIQUID (x(Zr) 0.54752) + BCC_A2 (x(Zr) 0.83928)
VZr-98Kor-LB.tdb	1510.2	V2ZR_C15 (x(Zr) 0.33333) + LIQUID (x(Zr) 0.54765) + BCC_A2 (x(Zr) 0.83935)
VZr-98Kor-LB.tdb	1062.92	V2ZR_C15 (x(Zr) 0.33333) + BCC_A2 (x(Zr) 0.92701) + HCP_A3 (x(Zr) 0.95906)
VZr-98Kor-LB.tdb	1062.91	V2ZR_C15 (x(Zr) 0.33333) + BCC_A2 (x(Zr) 0.92726) + HCP_A3 (x(Zr) 0.95919)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull VZr-05Ser · CALPHAD hull VZr-12Zha · CALPHAD hull VZr-16Cui-2 · CALPHAD hull VZr-98Kor-LB

Invariant reactions (literature)

Invariant reactions reported in the literature for the V–Zr system (46)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
2013	bcc-V + liquid -> V2Zr	bcc-V: Zr 0.02; V2Zr: V 0.666667, Zr 0.333333	experimental	[1] Zhao 2012 cites Rostoker 1954	Table 4, p. 5, row 4 report
1633	eutectic: Liquid -> V2Zr + bcc-Zr	V2Zr: V 0.666667, Zr 0.333333	experimental	[1] Zhao 2012 cites Rostoker 1954	Table 4, p. 5, row 10 report
1597.15	peritectic: L + bcc_A2 -> C15-Laves		model	[2] Servant 2005	Table 4, p. 5, row 2 report
1592.15	peritectic: L + bcc_A2 -> C15-Laves		model	[2] Servant 2005	Table 5, p. 6, row 2 report
1586.15	peritectic: L + bcc_A2 -> C15-Laves		model	[2] Servant 2005	Table 5, p. 6, row 1 report
1586	bcc-V + liquid -> V2Zr	bcc-V: Zr 0.049; liquid: Zr 0.478; V2Zr: Zr 0.335	model	[1] Zhao 2012 cites Servant 2005 doi	Table 4, p. 5, row 6 report
1573.15	peritectic: L + bcc_A2 -> C15-Laves		experimental	[2] Servant 2005 cites Smith 1990	Table 5, p. 6, row 3 report
1573.15	peritectic: L + bcc_A2 -> C15-Laves		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 5, p. 6, row 5 report
1573.15	peritectic: L + bcc_A2 -> C15-Laves		experimental	[2] Servant 2005 cites Smith 1990	Table 4, p. 5, row 3 report
1573.15	peritectic: L + bcc_A2 -> C15-Laves		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 4, p. 5, row 4 report
1573	bcc-V + liquid -> V2Zr	bcc-V: Zr 0.0571; liquid: Zr 0.479; V2Zr: Zr 0.3396	model	[1] Zhao 2012	Table 4, p. 5, row 1 report
1573	bcc-V + liquid -> V2Zr	V2Zr: V 0.666667, Zr 0.333333	experimental	[1] Zhao 2012 cites Williams 1955	Table 4, p. 5, row 3 report
1573	bcc-V + liquid -> V2Zr	bcc-V: Zr 0.05; liquid: Zr 0.48; V2Zr: Zr 0.333	experimental	[1] Zhao 2012 cites Massalski 1990	Table 4, p. 5, row 2 report
1572.15	peritectic: L + bcc_A2 -> C15-Laves		model	[2] Servant 2005	Table 4, p. 5, row 1 report
1553	bcc-V + liquid -> V2Zr	bcc-V: Zr 0.046; liquid: Zr 0.4941; V2Zr: Zr 0.3333	model	[1] Zhao 2012 cites COST507 1998	Table 4, p. 5, row 5 report
1552.85	peritectic: L + bcc_A2 -> C15-Laves		experimental	[2] Servant 2005 cites Korb 1998	Table 4, p. 5, row 5 report
1552.7	peritectic: bcc-A2 +Liquid -> V2Zr	bcc-A2: Zr 0.046; Liquid: Zr 0.494; V2Zr: Zr 0.333	model	[3] (ed.) 1998	Table I, p. 320, row 1 report
1538.15	eutectic: L -> C15-Laves + bcc_A2		experimental	[2] Servant 2005 cites Smith 1990	Table 4, p. 5, row 8 report
1538.15	eutectic: L -> C15-Laves + bcc_A2		experimental	[2] Servant 2005 cites Smith 1990	Table 5, p. 6, row 8 report
1538	eutectic: Liquid -> V2Zr + bcc-Zr	Liquid: Zr 0.57; V2Zr: Zr 0.35; bcc-Zr: Zr 0.835	experimental	[1] Zhao 2012 cites Massalski 1990	Table 4, p. 5, row 8 report
1538	eutectic: Liquid -> V2Zr + bcc-Zr	Liquid: Zr 0.5482; V2Zr: Zr 0.3435; bcc-Zr: Zr 0.8313	model	[1] Zhao 2012	Table 4, p. 5, row 7 report
1529.15	eutectic: L -> C15-Laves + bcc_A2		model	[2] Servant 2005	Table 4, p. 5, row 6 report
1528.15	eutectic: L -> C15-Laves + bcc_A2		model	[2] Servant 2005	Table 4, p. 5, row 7 report
1526.15	eutectic: L -> C15-Laves + bcc_A2		model	[2] Servant 2005	Table 5, p. 6, row 7 report
1525.15	eutectic: L -> C15-Laves + bcc_A2		model	[2] Servant 2005	Table 5, p. 6, row 6 report
1525	eutectic: Liquid -> V2Zr + bcc-Zr	Liquid: Zr 0.561; V2Zr: Zr 0.352; bcc-Zr: Zr 0.831	model	[1] Zhao 2012 cites Servant 2005 doi	Table 4, p. 5, row 12 report
1510.35	eutectic: L -> C15-Laves + bcc_A2		experimental	[2] Servant 2005 cites Korb 1998	Table 4, p. 5, row 10 report
1510.2	eutectic: Liquid -> V2Zr + bcc-A2	Liquid: Zr 0.548; V2Zr: Zr 0.333; bcc-A2: Zr 0.839	model	[3] (ed.) 1998	Table I, p. 320, row 2 report
1510	eutectic: Liquid -> V2Zr + bcc-Zr	Liquid: Zr 0.5477; V2Zr: Zr 0.3333; bcc-Zr: Zr 0.8393	model	[1] Zhao 2012 cites COST507 1998	Table 4, p. 5, row 11 report
1503	eutectic: Liquid -> V2Zr + bcc-Zr	V2Zr: V 0.666667, Zr 0.333333	experimental	[1] Zhao 2012 cites Williams 1955	Table 4, p. 5, row 9 report
1500.15	eutectic: L -> C15-Laves + bcc_A2		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 5, p. 6, row 9 report
1500.15	eutectic: L -> C15-Laves + bcc_A2		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 4, p. 5, row 9 report
1063.05	eutectoid: bcc_A2 -> C15-Laves + cph_A3		experimental	[2] Servant 2005 cites Korb 1998	Table 4, p. 5, row 15 report
1063	bcc-Zr -> V2Zr + hcp-Zr	bcc-Zr: Zr 0.9273; V2Zr: Zr 0.3333; hcp-Zr: Zr 0.9592	model	[1] Zhao 2012 cites COST507 1998	Table 4, p. 5, row 16 report
1062.9	eutectoid: bcc-A2 -> V2Zr + hcp-A3	bcc-A2: Zr 0.927; V2Zr: Zr 0.333; hcp-A3: Zr 0.959	model	[3] (ed.) 1998	Table I, p. 320, row 3 report
1053.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 5, p. 6, row 13 report
1053.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		experimental	[2] Servant 2005 cites Williams 1955 doi	Table 4, p. 5, row 14 report
1050.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		experimental	[2] Servant 2005 cites Smith 1990	Table 4, p. 5, row 13 report
1050	bcc-Zr -> V2Zr + hcp-Zr	bcc-Zr: Zr 0.914; V2Zr: Zr 0.345; hcp-Zr: Zr 0.99	experimental	[1] Zhao 2012 cites Massalski 1990	Table 4, p. 5, row 14 report
1050	bcc-Zr -> V2Zr + hcp-Zr	V2Zr: V 0.666667, Zr 0.333333	experimental	[1] Zhao 2012 cites Williams 1955	Table 4, p. 5, row 15 report
1050	bcc-Zr -> V2Zr + hcp-Zr	bcc-Zr: Zr 0.9287; V2Zr: Zr 0.3496; hcp-Zr: Zr 0.9968	model	[1] Zhao 2012	Table 4, p. 5, row 13 report
1046.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		model	[2] Servant 2005	Table 5, p. 6, row 10 report
1046	bcc-Zr -> V2Zr + hcp-Zr	bcc-Zr: Zr 0.922; V2Zr: Zr 0.343; hcp-Zr: Zr 0.969	model	[1] Zhao 2012 cites Servant 2005 doi	Table 4, p. 5, row 17 report
1044.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		experimental	[2] Servant 2005 cites Smith 1990	Table 5, p. 6, row 12 report
1044.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		model	[2] Servant 2005	Table 5, p. 6, row 11 report
1043.15	eutectoid: bcc_A2 -> C15-Laves + cph_A3		model	[2] Servant 2005	Table 4, p. 5, row 11 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, V–Zr system (3)
Phase	Value	T (K)	Class	Source	Location
Laves	-5.181 kJ/mol (basis unstated)	298.15	model	[2] Servant 2005	Table 1, p. 2, row 10 report
Laves	-4.786 kJ/mol (basis unstated)	298.15	model	[2] Servant 2005	Table 1, p. 2, row 8 report
Laves phase	-4.681 kJ/mol (basis unstated)	298.15	model	[2] Servant 2005	Table 1, p. 2, row 9 report

Other properties

Mixing / partial (3)

Mixing / partial, V–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Enthalpy of mixing printed: ΔHmelting	-4.204 kJ/mol (basis unstated)	298.15	liquid alloy: V 0.5, Zr 0.5	model	[2] Servant 2005	Table 1, p. 2, row 9 report
Enthalpy of mixing printed: ΔHmelting	-4.35 kJ/mol (basis unstated)	298.15	liquid alloy: V 0.5, Zr 0.5	model	[2] Servant 2005	Table 1, p. 2, row 8 report
Enthalpy of mixing printed: ΔHmelting	-3.92 kJ/mol (basis unstated)	298.15	liquid alloy: V 0.5, Zr 0.5	model	[2] Servant 2005	Table 1, p. 2, row 10 report

Crystal structure (1)

Crystal structure, V–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Lattice a	7.45 Å	298.15	V2Zr alloy: Zr 0.333333	unspecified	[1] Zhao 2012 cites Finkel 1980	Table 1, p. 3, row 3 report

Sources

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

Xu-Shan Zhao, Gai-Huan Yuan, Mei-Yi Yao, Qiang Yue, Jian-Yun Shen, First-principles calculations and thermodynamic modeling of the V–Zr system, Calphad 36, 163-168 (2012). doi:10.1016/j.calphad.2011.07.003
C. Servant, Thermodynamic Assessments of the Phase Diagrams of the Hafnium-Vanadium and Vanadium-Zirconium Systems, Journal of Phase Equilibria & Diffusion 26, 39-49 (2005). doi:10.1361/15477030522464
I. Ansara, A. T. Dinsdale, M. H. Rand (eds.), COST 507: Thermochemical database for light metal alloys, Volume 2, EUR 18499 EN, Office for Official Publications of the European Communities, Luxembourg (1998), ISBN 92-828-3902-8.

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}
}