# V–B system

> V–B system: 0 accepted literature values (none) and 4 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/V-B.html · Markdown: https://data.orchid-project.org/systems/V-B.md

0 accepted literature values from 0 paper(s); 4 calculated phase diagram(s).

Data: [interactive phase diagram](https://orchid-project.org/phase-diagrams/#V-B/VB-12Hom.json) · [Markdown](https://data.orchid-project.org/systems/V-B.md)

## 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.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| VB-12Hom.tdb | V. Homolova, A. Kroupa, A. Vyrostkova, J. Alloys Compd., 520, 30-35(2012). [doi:10.1016/j.jallcom.2011.11.155](https://doi.org/10.1016/j.jallcom.2011.11.155) | `5dc15917ed367b37733c7ccdb81d243f7aeeaaaec7120de416a8a9b7776fe1b3` | [viewer](https://orchid-project.org/phase-diagrams/#V-B/VB-12Hom.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/VB-12Hom.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/VB-12Hom.json) |
| VB-17Pin.tdb | A.A.A. Pinto da Silva, N. Chaia, F. Ferreira, G.C. Coelho, J.-M. Fiorani, N. David, M. Vilasi, C.A. Nunes, Calphad, 59, 199-206(2017). [doi:10.1016/j.calphad.2017.10.001](https://doi.org/10.1016/j.calphad.2017.10.001) | `672a0c551b49a3b210de043afe38324de374e7ea446c517ab8658d5f29222b40` | [viewer](https://orchid-project.org/phase-diagrams/#V-B/VB-17Pin.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/VB-17Pin.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/VB-17Pin.json) |
| VB-81Spe.tdb | K.E. Spear, J.H. Blanks, M.S. Wang, J. Less-Common Met., 82, 237-43(1981). [doi:10.1016/0022-5088(81)90224-1](https://doi.org/10.1016/0022-5088%2881%2990224-1) | `3d2fe26a3074d813e3a6991ef339793d2db288b3b15d840180cfeb72be06dfd3` | [viewer](https://orchid-project.org/phase-diagrams/#V-B/VB-81Spe.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/VB-81Spe.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/VB-81Spe.json) |
| VB-91Pan-LB.tdb | L.-M. Pan, unpublished, 1991. | `6135bb1fbdaf1397cd4d433fcc275355104df9f5fdbe8b9047e21a575555e4dc` | [viewer](https://orchid-project.org/phase-diagrams/#V-B/VB-91Pan-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/VB-91Pan-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/VB-91Pan-LB.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| VB-12Hom.tdb | 2923.06 | LIQUID (x(B) 0.56316) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-12Hom.tdb | 2923.06 | LIQUID (x(B) 0.56352) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-12Hom.tdb | 2923.05 | LIQUID (x(B) 0.56329) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-12Hom.tdb | 2912.58 | LIQUID (x(B) 0.55078) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-12Hom.tdb | 2912.58 | LIQUID (x(B) 0.55063) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-12Hom.tdb | 2912.58 | LIQUID (x(B) 0.55107) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-12Hom.tdb | 2815.44 | LIQUID (x(B) 0.4702) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-12Hom.tdb | 2815.44 | LIQUID (x(B) 0.47055) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-12Hom.tdb | 2815.44 | LIQUID (x(B) 0.47007) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-12Hom.tdb | 2307.86 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.95624) + BETA_RHOMBO_B (x(B) 1) |
| VB-12Hom.tdb | 2307.86 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.95639) + BETA_RHOMBO_B (x(B) 1) |
| VB-12Hom.tdb | 2195.54 | LIQUID (x(B) 0.22103) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-12Hom.tdb | 2195.54 | LIQUID (x(B) 0.22111) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-12Hom.tdb | 2195.54 | LIQUID (x(B) 0.22099) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-12Hom.tdb | 2080.21 | MB_B33 (x(B) 0.5) + V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) |
| VB-12Hom.tdb | 2006.43 | BCC_A2 (x(B) 0.00782) + LIQUID (x(B) 0.14505) + V3B2_D5A (x(B) 0.4) |
| VB-12Hom.tdb | 2006.43 | BCC_A2 (x(B) 0.00781) + LIQUID (x(B) 0.14492) + V3B2_D5A (x(B) 0.4) |
| VB-17Pin.tdb | 2878.16 | LIQUID (x(B) 0.53614) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-17Pin.tdb | 2878.16 | LIQUID (x(B) 0.53606) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-17Pin.tdb | 2878.16 | LIQUID (x(B) 0.53618) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-17Pin.tdb | 2872.31 | LIQUID (x(B) 0.53145) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-17Pin.tdb | 2872.31 | LIQUID (x(B) 0.53146) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-17Pin.tdb | 2872.31 | LIQUID (x(B) 0.53142) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-17Pin.tdb | 2857.7 | LIQUID (x(B) 0.51545) + V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) |
| VB-17Pin.tdb | 2857.7 | LIQUID (x(B) 0.51544) + V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) |
| VB-17Pin.tdb | 2856.9 | MB_B33 (x(B) 0.5) + LIQUID (x(B) 0.51409) + V5B6 (x(B) 0.54545) |
| VB-17Pin.tdb | 2310.46 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.96156) + BETA_RHOMBO_B (x(B) 1) |
| VB-17Pin.tdb | 2310.45 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.96177) + BETA_RHOMBO_B (x(B) 1) |
| VB-17Pin.tdb | 2177.81 | LIQUID (x(B) 0.18713) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-17Pin.tdb | 2177.81 | LIQUID (x(B) 0.18716) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-17Pin.tdb | 2004.56 | BCC_A2 (x(B) 1.400e-4) + LIQUID (x(B) 0.11307) + V3B2_D5A (x(B) 0.4) |
| VB-17Pin.tdb | 2004.56 | BCC_A2 (x(B) 1.400e-4) + LIQUID (x(B) 0.11295) + V3B2_D5A (x(B) 0.4) |
| VB-17Pin.tdb | 2004.56 | BCC_A2 (x(B) 1.400e-4) + LIQUID (x(B) 0.11295) + V3B2_D5A (x(B) 0.4) |
| VB-81Spe.tdb | 2908.94 | LIQUID (x(B) 0.57613) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-81Spe.tdb | 2908.94 | LIQUID (x(B) 0.576) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-81Spe.tdb | 2908.94 | LIQUID (x(B) 0.57635) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-81Spe.tdb | 2897.22 | LIQUID (x(B) 0.56079) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-81Spe.tdb | 2897.21 | LIQUID (x(B) 0.56053) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-81Spe.tdb | 2897.21 | LIQUID (x(B) 0.56042) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-81Spe.tdb | 2809.11 | LIQUID (x(B) 0.48632) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-81Spe.tdb | 2809.11 | LIQUID (x(B) 0.48656) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-81Spe.tdb | 2809.11 | LIQUID (x(B) 0.48623) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-81Spe.tdb | 2324.41 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.97032) + BETA_RHOMBO_B (x(B) 1) |
| VB-81Spe.tdb | 2324.41 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.97039) + BETA_RHOMBO_B (x(B) 1) |
| VB-81Spe.tdb | 2195.92 | LIQUID (x(B) 0.24899) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-81Spe.tdb | 2195.92 | LIQUID (x(B) 0.24912) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-81Spe.tdb | 2195.92 | LIQUID (x(B) 0.24897) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-81Spe.tdb | 2009.91 | BCC_A2 (x(B) 0) + LIQUID (x(B) 0.15483) + V3B2_D5A (x(B) 0.4) |
| VB-81Spe.tdb | 2009.91 | BCC_A2 (x(B) 0) + LIQUID (x(B) 0.15479) + V3B2_D5A (x(B) 0.4) |
| VB-81Spe.tdb | 2009.91 | BCC_A2 (x(B) 0) + LIQUID (x(B) 0.1546) + V3B2_D5A (x(B) 0.4) |
| VB-81Spe.tdb | 1992.65 | MB_B33 (x(B) 0.5) + V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) |
| VB-91Pan-LB.tdb | 2923.06 | LIQUID (x(B) 0.56316) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-91Pan-LB.tdb | 2923.06 | LIQUID (x(B) 0.56352) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-91Pan-LB.tdb | 2923.05 | LIQUID (x(B) 0.56329) + V2B3 (x(B) 0.6) + MB2_C32 (x(B) 0.66667) |
| VB-91Pan-LB.tdb | 2912.58 | LIQUID (x(B) 0.55078) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-91Pan-LB.tdb | 2912.58 | LIQUID (x(B) 0.55063) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-91Pan-LB.tdb | 2912.58 | LIQUID (x(B) 0.55107) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |
| VB-91Pan-LB.tdb | 2815.44 | LIQUID (x(B) 0.4702) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-91Pan-LB.tdb | 2815.44 | LIQUID (x(B) 0.47055) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-91Pan-LB.tdb | 2815.44 | LIQUID (x(B) 0.47007) + MB_B33 (x(B) 0.5) + V3B4_D7B (x(B) 0.57143) |
| VB-91Pan-LB.tdb | 2307.86 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.95624) + BETA_RHOMBO_B (x(B) 1) |
| VB-91Pan-LB.tdb | 2307.86 | MB2_C32 (x(B) 0.66667) + LIQUID (x(B) 0.95639) + BETA_RHOMBO_B (x(B) 1) |
| VB-91Pan-LB.tdb | 2195.54 | LIQUID (x(B) 0.22103) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-91Pan-LB.tdb | 2195.54 | LIQUID (x(B) 0.22112) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-91Pan-LB.tdb | 2195.54 | LIQUID (x(B) 0.22099) + V3B2_D5A (x(B) 0.4) + MB_B33 (x(B) 0.5) |
| VB-91Pan-LB.tdb | 2021.89 | MB_B33 (x(B) 0.5) + V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) |
| VB-91Pan-LB.tdb | 2006.5 | BCC_A2 (x(B) 0.00786) + LIQUID (x(B) 0.14508) + V3B2_D5A (x(B) 0.4) |
| VB-91Pan-LB.tdb | 2006.5 | BCC_A2 (x(B) 0.00786) + LIQUID (x(B) 0.14495) + V3B2_D5A (x(B) 0.4) |
| VB-91Pan-LB.tdb | 763.09 | V5B6 (x(B) 0.54545) + V3B4_D7B (x(B) 0.57143) + V2B3 (x(B) 0.6) |

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- 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; 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).

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_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_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 ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).