Mn–V phases

8 phases (tier A 7, liquid 1); 7 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 · Mn–V system page · Markdown · field reference

Phases of the Mn–V system (8)
Phase	Structure	Basis	Stability (calculated)	TDB models
BCC_A2 phase:mn-v:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–3288 K, x(V) 0–1	1
CBCC_A12 phase:mn-v:cbcc-a12	alpha-Mn · A12 · cI58 · I-43m (217)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1162.73 K, x(V) 0–0.08481	1
CUB_A13 phase:mn-v:cub-a13	beta-Mn · A13 · cP20 · P4_132 (213)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 980–1377.57 K, x(V) 0–0.07806	1
SIGMA_D8B phase:mn-v:d8b-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 479.35–1342.97 K, x(V) 0.14195–0.36877	1
FCC_A1 phase:mn-v:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 1360–1479.75 K, x(V) 0–0.00377	1
HCP_A3 phase:mn-v:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	1
LIQUID phase:mn-v:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 1513–4000 K, x(V) 0–1	1
SIGMA_OLD phase:mn-v:old-sigma	sigma-CrFe · D8_b · tP30 · P4_2/mnm (136)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1300 K, x(V) 0.13333–0.35057	1

BCC_A2 (Mn–V)

Id: phase:mn-v: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 1 of 1 calculated diagram(s): 300–3288 K, x(V) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:bcc-a2
tdb: tdb:MnV-91Hua-LB.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: BCC_A2, type code %B, sha256 a91ef616c2065173…

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

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

CBCC_A12 (Mn–V)

Id: phase:mn-v:cbcc-a12; status assigned
Structure: alpha-Mn · A12 · cI58 · I-43m (217); type st:a12-alpha-mn-ci58; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1162.73 K, x(V) 0–0.08481
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:cbcc-a12
tdb: tdb:MnV-91Hua-LB.tdb:CBCC_A12

TDB models of CBCC_A12 (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: CBCC_A12, type code %A, sha256 a91ef616c2065173…

45: PHASE CBCC_A12 %A 2 1 1 !
46: CONST CBCC_A12 : MN% V : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

CUB_A13 (Mn–V)

Id: phase:mn-v:cub-a13; status assigned
Structure: beta-Mn · A13 · cP20 · P4_132 (213); type st:a13-beta-mn-cp20; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 980–1377.57 K, x(V) 0–0.07806
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:cub-a13
tdb: tdb:MnV-91Hua-LB.tdb:CUB_A13

TDB models of CUB_A13 (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: CUB_A13, type code %, sha256 a91ef616c2065173…

50: PHASE CUB_A13 % 2 1 1 !
51: CONST CUB_A13 : MN% V : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

SIGMA_D8B (Mn–V)

Id: phase:mn-v:d8b-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in MnV-91Hua-LB.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 479.35–1342.97 K, x(V) 0.14195–0.36877
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:d8b-sigma
tdb: tdb:MnV-91Hua-LB.tdb:SIGMA_D8B

TDB models of SIGMA_D8B (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: SIGMA_D8B, type code %, sha256 a91ef616c2065173…

55: PHASE SIGMA_D8B % 3 10 4 16 !
56: CONST SIGMA_D8B : MN V : V : MN V : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

FCC_A1 (Mn–V)

Id: phase:mn-v:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1360–1479.75 K, x(V) 0–0.00377
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:fcc-a1
tdb: tdb:MnV-91Hua-LB.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: FCC_A1, type code %A, sha256 a91ef616c2065173…

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

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

HCP_A3 (Mn–V)

Id: phase:mn-v: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: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:hcp-a3
tdb: tdb:MnV-91Hua-LB.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

MnV-91Hua-LB.tdb: HCP_A3, type code %A, sha256 a91ef616c2065173…

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

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

LIQUID (Mn–V)

Id: phase:mn-v:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 1513–4000 K, x(V) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:liquid
tdb: tdb:MnV-91Hua-LB.tdb:LIQUID

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

MnV-91Hua-LB.tdb: LIQUID, type code %, sha256 a91ef616c2065173…

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

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

SIGMA_OLD (Mn–V)

Id: phase:mn-v:old-sigma; status assigned
Structure: sigma-CrFe · D8_b · tP30 · P4_2/mnm (136); type st:d8-b-sigma-crfe-tp30; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–1300 K, x(V) 0.13333–0.35057
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:mn-v:old-sigma
tdb: tdb:MnV-91Hua-LB.tdb:SIGMA_OLD

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

MnV-91Hua-LB.tdb: SIGMA_OLD, type code %, sha256 a91ef616c2065173…

60: PHASE SIGMA_OLD % 3 8 4 18 !
61: CONST SIGMA_OLD : MN : V : MN V : !

Example references (1 of 1; assessments first):

doi:10.1016/0364-5916(91)90018-F W. Huang, Calphad, 15, 195-208(1991).
assessment that models this phase

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}
}