# Mn–V phases > Mn–V system: 8 phases (tier A 7, liquid 1); 7 stable in a calculated diagram in the ORCHID phase registry, with names, structure type when the stored evidence supports an assignment under the stated tier rules, calculated stability, verbatim TDB PHASE/CONSTITUENT statements and example references. HTML: https://data.orchid-project.org/phases/pages/MN-V.html · Markdown: https://data.orchid-project.org/phases/pages/MN-V.md 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](https://orchid-project.org/phases/?q=MN-V) · [full JSON](https://data.orchid-project.org/phases/systems/MN-V.json) · [Mn–V system page](https://data.orchid-project.org/systems/MN-V.html) · [Markdown](https://data.orchid-project.org/phases/pages/MN-V.md) · [field reference](https://data.orchid-project.org/phases/SCHEMA.md) Table: Phases of the Mn–V system (8) | Phase | Structure | Basis | Stability (calculated) | Literature values | TDB models | |---|---|---|---|---:|---:| | [BCC_A2](#phase-mn-v-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 | 0 | 1 | | [CBCC_A12](#phase-mn-v-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 | 0 | 1 | | [CUB_A13](#phase-mn-v-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 | 0 | 1 | | [SIGMA_D8B](#phase-mn-v-d8b-sigma); _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 | 0 | 1 | | [FCC_A1](#phase-mn-v-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 | 0 | 1 | | [HCP_A3](#phase-mn-v-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) | 0 | 1 | | [LIQUID](#phase-mn-v-liquid); _phase:mn-v:liquid_ | liquid | liquid | stable in 1 of 1 calculated diagram(s): 1513–4000 K, x(V) 0–1 | 0 | 1 | | [SIGMA_OLD](#phase-mn-v-old-sigma); _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 | 0 | 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](https://orchid-project.org/phases/#phase:mn-v:bcc-a2) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): BCC_A2, type code %B, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:cbcc-a12) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): CBCC_A12, type code %A, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:cub-a13) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): CUB_A13, type code %, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:d8b-sigma) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): SIGMA_D8B, type code %, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:fcc-a1) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): FCC_A1, type code %A, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:hcp-a3) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): HCP_A3, type code %A, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:liquid) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): LIQUID, type code %, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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](https://orchid-project.org/phases/#phase:mn-v:old-sigma) 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](https://orchid-project.org/data/databases/sgte-binary/MnV-91Hua-LB.tdb): SIGMA_OLD, type code %, sha256 `a91ef616c2065173…` ~~~~text 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](https://doi.org/10.1016/0364-5916%2891%2990018-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). https://doi.org/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). https://doi.org/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. ```bibtex @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} } ``` --- Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite the ORCHID phase registry and the sources named on the page (TDB assessments, Hallstedt 2025, Materials Project, OQMD). TDB statements are quoted as written; parameter expressions are not reproduced. Field reference: [SCHEMA.md](https://data.orchid-project.org/phases/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt).