V–Zr phases

6 phases (tier A 5, liquid 1); 5 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · V–Zr system page · Markdown · field reference

Phases of the V–Zr system (6)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:v-zr:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–3999.1 K, x(Zr) 0–1	46	5
C15_LAVES phase:v-zr:c15-laves	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 4 of 4 calculated diagram(s): 300–1586.45 K, x(Zr) 0.32568–0.67	46	4
FCC_A1 phase:v-zr:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	not stable in 5 calculated diagram(s)	0	5
HCP_A3 phase:v-zr:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–2174 K, x(Zr) 0.95906–1	14	5
LIQUID phase:v-zr:liquid	liquid	liquid	stable in 5 of 5 calculated diagram(s): 1510.2–4000 K, x(Zr) 0–1	35	5
V2ZR_C15 phase:v-zr:v2zr-c15	Cu2Mg · C15 · cF24 · Fd-3m (227)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1552.75 K, x(Zr) 0.33333–0.33333	0	1

BCC_A2 (V–Zr)

Id: phase:v-zr:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 300–3999.1 K, x(Zr) 0–1
Literature: 46 values (46 accepted) from 3 papers
Interactive: phase registry entry

Names (10): corpus: corpus:phase:v-zr:bcc-a2
paper: paper:10.1016/j.calphad.2011.07.003:bcc-V, paper:10.1016/j.calphad.2011.07.003:bcc-Zr, paper:10.1361/15477030522464:bcc_A2, paper:sha256-85fd53a1a176b694:bcc-A2
tdb: tdb:VZr-05Ser.tdb:BCC_A2, tdb:VZr-12Zha.tdb:BCC_A2, tdb:VZr-16Cui-1.tdb:BCC_A2, tdb:VZr-16Cui-2.tdb:BCC_A2, tdb:VZr-98Kor-LB.tdb:BCC_A2

TDB models of BCC_A2 (5): PHASE and CONSTITUENT statements as written

VZr-05Ser.tdb: BCC_A2, type code %B, sha256 a133e5b6ad447e31…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : V% ZR% : VA : !

VZr-12Zha.tdb: BCC_A2, type code %B, sha256 d2ae83ad51b4411a…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : V% ZR% : VA : !

VZr-16Cui-1.tdb: BCC_A2, type code %B, sha256 89ebe6dfb309eac5…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : V% ZR% : VA : !

VZr-16Cui-2.tdb: BCC_A2, type code %B, sha256 54a76005b6cc7862…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : V% ZR% : VA : !

VZr-98Kor-LB.tdb: BCC_A2, type code %B, sha256 6847bb5a2a797e43…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : V% ZR% : VA : !

Example references (6 of 6; assessments first):

doi:10.1361/15477030522464 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.07.003 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2016.03.008 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016).
assessment that models this phase
doi:10.1016/j.calphad.2016.09.003 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016).
assessment that models this phase
doi:10.1007/bf03377505 J.T. Williams, Vanadium-Zirconium Alloy System, Trans. AIME, Vol 203, 1955, p 345-350
cited as the source of values for this phase
doi:10.1007/s11669-005-0056-x C. Servant, Thermodynamic assessments of the phase diagrams of the hafnium-vanadium and vanadium-zirconium systems, J Phs Eqil and Diff 26, 39-49 (2005).
cited as the source of values for this phase

C15_LAVES (V–Zr)

Id: phase:v-zr:c15-laves; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in VZr-05Ser.tdb also describes the disordered state
Caveat: partitioned order/disorder model in VZr-12Zha.tdb also describes the disordered state
Caveat: partitioned order/disorder model in VZr-16Cui-1.tdb also describes the disordered state
Caveat: partitioned order/disorder model in VZr-16Cui-2.tdb also describes the disordered state
Stability: stable in 4 of 4 calculated diagram(s): 300–1586.45 K, x(Zr) 0.32568–0.67
Literature: 46 values (46 accepted) from 3 papers
Interactive: phase registry entry

Names (8): corpus: corpus:phase:v-zr:c15-laves
paper: paper:10.1016/j.calphad.2011.07.003:V2Zr, paper:10.1361/15477030522464:C15-Laves, paper:sha256-85fd53a1a176b694:V2Zr
tdb: tdb:VZr-05Ser.tdb:C15_LAVES, tdb:VZr-12Zha.tdb:C15_LAVES, tdb:VZr-16Cui-1.tdb:C15_LAVES, tdb:VZr-16Cui-2.tdb:C15_LAVES

TDB models of C15_LAVES (4): PHASE and CONSTITUENT statements as written

VZr-05Ser.tdb: C15_LAVES, type code %, sha256 a133e5b6ad447e31…

44: PHASE C15_LAVES % 2 2 1 !
45: CONST C15_LAVES : V% ZR : V ZR% : !

VZr-12Zha.tdb: C15_LAVES, type code %, sha256 d2ae83ad51b4411a…

43: PHASE C15_LAVES % 2 2 1 !
44: CONST C15_LAVES : V% ZR : V ZR% : !

VZr-16Cui-1.tdb: C15_LAVES, type code %, sha256 89ebe6dfb309eac5…

42: PHASE C15_LAVES % 2 2 1 !
43: CONST C15_LAVES : V% ZR : V ZR% : !

VZr-16Cui-2.tdb: C15_LAVES, type code %, sha256 54a76005b6cc7862…

45: PHASE C15_LAVES % 2 2 1 !
46: CONST C15_LAVES : V% ZR : V ZR% : !

Example references (6 of 6; assessments first):

doi:10.1361/15477030522464 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.07.003 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2016.03.008 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016).
assessment that models this phase
doi:10.1016/j.calphad.2016.09.003 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016).
assessment that models this phase
doi:10.1007/bf03377505 J.T. Williams, Vanadium-Zirconium Alloy System, Trans. AIME, Vol 203, 1955, p 345-350
cited as the source of values for this phase
doi:10.1007/s11669-005-0056-x C. Servant, Thermodynamic assessments of the phase diagrams of the hafnium-vanadium and vanadium-zirconium systems, J Phs Eqil and Diff 26, 39-49 (2005).
cited as the source of values for this phase

FCC_A1 (V–Zr)

Id: phase:v-zr:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: not stable in 5 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:v-zr:fcc-a1
tdb: tdb:VZr-05Ser.tdb:FCC_A1, tdb:VZr-12Zha.tdb:FCC_A1, tdb:VZr-16Cui-1.tdb:FCC_A1, tdb:VZr-16Cui-2.tdb:FCC_A1, tdb:VZr-98Kor-LB.tdb:FCC_A1

TDB models of FCC_A1 (5): PHASE and CONSTITUENT statements as written

VZr-05Ser.tdb: FCC_A1, type code %A, sha256 a133e5b6ad447e31…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : V ZR : VA : !

VZr-12Zha.tdb: FCC_A1, type code %A, sha256 d2ae83ad51b4411a…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : V ZR : VA : !

VZr-16Cui-1.tdb: FCC_A1, type code %A, sha256 89ebe6dfb309eac5…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : V ZR : VA : !

VZr-16Cui-2.tdb: FCC_A1, type code %A, sha256 54a76005b6cc7862…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : V ZR : VA : !

VZr-98Kor-LB.tdb: FCC_A1, type code %A, sha256 6847bb5a2a797e43…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : V ZR : VA : !

Example references (4 of 4; assessments first):

doi:10.1016/j.calphad.2011.07.003 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).
assessment that models this phase
doi:10.1016/j.calphad.2016.03.008 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016).
assessment that models this phase
doi:10.1016/j.calphad.2016.09.003 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016).
assessment that models this phase
doi:10.1361/15477030522464 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).
assessment that models this phase

HCP_A3 (V–Zr)

Id: phase:v-zr:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 300–2174 K, x(Zr) 0.95906–1
Literature: 14 values (14 accepted) from 3 papers
Interactive: phase registry entry

Names (9): corpus: corpus:phase:v-zr:hcp-a3
paper: paper:10.1016/j.calphad.2011.07.003:hcp-Zr, paper:10.1361/15477030522464:cph_A3, paper:sha256-85fd53a1a176b694:hcp-A3
tdb: tdb:VZr-05Ser.tdb:HCP_A3, tdb:VZr-12Zha.tdb:HCP_A3, tdb:VZr-16Cui-1.tdb:HCP_A3, tdb:VZr-16Cui-2.tdb:HCP_A3, tdb:VZr-98Kor-LB.tdb:HCP_A3

TDB models of HCP_A3 (5): PHASE and CONSTITUENT statements as written

VZr-05Ser.tdb: HCP_A3, type code %A, sha256 a133e5b6ad447e31…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : V ZR% : VA : !

VZr-12Zha.tdb: HCP_A3, type code %A, sha256 d2ae83ad51b4411a…

38: PHASE HCP_A3 %A 2 1 0.5 !
39: CONST HCP_A3 : V ZR% : VA : !

VZr-16Cui-1.tdb: HCP_A3, type code %A, sha256 89ebe6dfb309eac5…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : V ZR% : VA : !

VZr-16Cui-2.tdb: HCP_A3, type code %A, sha256 54a76005b6cc7862…

40: PHASE HCP_A3 %A 2 1 0.5 !
41: CONST HCP_A3 : V ZR% : VA : !

VZr-98Kor-LB.tdb: HCP_A3, type code %A, sha256 6847bb5a2a797e43…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : V ZR% : VA : !

Example references (6 of 6; assessments first):

doi:10.1361/15477030522464 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.07.003 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2016.03.008 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016).
assessment that models this phase
doi:10.1016/j.calphad.2016.09.003 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016).
assessment that models this phase
doi:10.1007/bf03377505 J.T. Williams, Vanadium-Zirconium Alloy System, Trans. AIME, Vol 203, 1955, p 345-350
cited as the source of values for this phase
doi:10.1007/s11669-005-0056-x C. Servant, Thermodynamic assessments of the phase diagrams of the hafnium-vanadium and vanadium-zirconium systems, J Phs Eqil and Diff 26, 39-49 (2005).
cited as the source of values for this phase

LIQUID (V–Zr)

Id: phase:v-zr:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 5 of 5 calculated diagram(s): 1510.2–4000 K, x(Zr) 0–1
Literature: 35 values (35 accepted) from 3 papers
Interactive: phase registry entry

Names (11): corpus: corpus:phase:v-zr:liquid
paper: paper:10.1016/j.calphad.2011.07.003:Liquid, paper:10.1016/j.calphad.2011.07.003:liquid, paper:10.1361/15477030522464:L, paper:10.1361/15477030522464:liquid, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:VZr-05Ser.tdb:LIQUID, tdb:VZr-12Zha.tdb:LIQUID, tdb:VZr-16Cui-1.tdb:LIQUID, tdb:VZr-16Cui-2.tdb:LIQUID, tdb:VZr-98Kor-LB.tdb:LIQUID

TDB models of LIQUID (5): PHASE and CONSTITUENT statements as written

VZr-05Ser.tdb: LIQUID, type code %, sha256 a133e5b6ad447e31…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : V ZR : !

VZr-12Zha.tdb: LIQUID, type code %, sha256 d2ae83ad51b4411a…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : V ZR : !

VZr-16Cui-1.tdb: LIQUID, type code %, sha256 89ebe6dfb309eac5…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : V ZR : !

VZr-16Cui-2.tdb: LIQUID, type code %, sha256 54a76005b6cc7862…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : V ZR : !

VZr-98Kor-LB.tdb: LIQUID, type code %, sha256 6847bb5a2a797e43…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : V ZR : !

Example references (6 of 6; assessments first):

doi:10.1361/15477030522464 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.07.003 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).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2016.03.008 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 53, 122-29(2016).
assessment that models this phase
doi:10.1016/j.calphad.2016.09.003 J. Cui, C. Guo, L. Zou, C. Li, Z. Du, Calphad, 55, 189-98(2016).
assessment that models this phase
doi:10.1007/bf03377505 J.T. Williams, Vanadium-Zirconium Alloy System, Trans. AIME, Vol 203, 1955, p 345-350
cited as the source of values for this phase
doi:10.1007/s11669-005-0056-x C. Servant, Thermodynamic assessments of the phase diagrams of the hafnium-vanadium and vanadium-zirconium systems, J Phs Eqil and Diff 26, 39-49 (2005).
cited as the source of values for this phase

V2ZR_C15 (V–Zr)

Id: phase:v-zr:v2zr-c15; status assigned
Structure: Cu2Mg · C15 · cF24 · Fd-3m (227); type st:c15-cu2mg-cf24; tier A: standard phase name; confidence high
Stoichiometry: V 0.6667, Zr 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1552.75 K, x(Zr) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:v-zr:v2zr-c15
tdb: tdb:VZr-98Kor-LB.tdb:V2ZR_C15

TDB models of V2ZR_C15 (1): PHASE and CONSTITUENT statements as written

VZr-98Kor-LB.tdb: V2ZR_C15, type code %, sha256 6847bb5a2a797e43…

40: PHASE V2ZR_C15 % 2 2 1 !
41: CONST V2ZR_C15 : V : ZR : !

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  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}
}