# Fe–V system

> Fe–V system: 2 accepted literature values (formation 2) and 5 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

2 accepted literature values from 1 paper(s) (experimental 2); 5 calculated phase diagram(s). 4 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/FE-V.json) · [CSV](https://data.orchid-project.org/systems/FE-V.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#FE-V) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#FE-V/FeV-12Guo.json) · [phases (6)](https://data.orchid-project.org/phases/pages/FE-V.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/FE-V.html) · [Markdown](https://data.orchid-project.org/systems/FE-V.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 2 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| formation | 2 |

## 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 |
|---|---|---|---|
| FeV-12Guo.tdb | C. Guo, C. Li, X. Zheng, Z. Du, Calphad, 38, 155-60(2012). [doi:10.1016/j.calphad.2012.06.010](https://doi.org/10.1016/j.calphad.2012.06.010) | `16cbad7b1e894fc9604ab6cf2b7ae8691ad648cd9b1e5596fbfd4dd8c96742cd` | [viewer](https://orchid-project.org/phase-diagrams/#FE-V/FeV-12Guo.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeV-12Guo.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeV-12Guo.json) |
| FeV-23Pan.tdb | Q. Pan, W. Liu, T. Wu, W. Zheng, J. Wang, X.-G. Lu, Calphad, 80, 102529(2023). [doi:10.1016/j.calphad.2023.102529](https://doi.org/10.1016/j.calphad.2023.102529) | `628bcb5606df1ede3afee686c504cf5e68b86bb9bc69f805c138e5b652d85343` | [viewer](https://orchid-project.org/phase-diagrams/#FE-V/FeV-23Pan.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeV-23Pan.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeV-23Pan.json) |
| FeV-83And.tdb | J.-O. Andersson, Calphad, 7, 305-15(1983). [doi:10.1016/0364-5916(83)90010-X](https://doi.org/10.1016/0364-5916%2883%2990010-X) | `ae3a5084e051fc28b6c2bd07690fbf85a31ee87510523291a51253b25430b569` | [viewer](https://orchid-project.org/phase-diagrams/#FE-V/FeV-83And.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeV-83And.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeV-83And.json) |
| FeV-91Har.tdb | K.C. Hari Kumar, V. Raghavan, Calphad, 15, 307-14(1991). [doi:10.1016/0364-5916(91)90008-8](https://doi.org/10.1016/0364-5916%2891%2990008-8) | `6a58f15acd80cf547d8a86b47aef9d78e5b130a47a0daaf0ebb0ab51e527ae54` | [viewer](https://orchid-project.org/phase-diagrams/#FE-V/FeV-91Har.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeV-91Har.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeV-91Har.json) |
| FeV-91Hua-LB.tdb | W. Huang, Z. Metallkd., 82, 391-401(1991). [doi:10.1515/ijmr-1991-820510](https://doi.org/10.1515/ijmr-1991-820510) | `879c739fcb81e8717cefff8487f75c373a1caee90c855401fdbec2be3f22a113` | [viewer](https://orchid-project.org/phase-diagrams/#FE-V/FeV-91Hua-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/FeV-91Hua-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/FeV-91Hua-LB.json) |

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

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| FeV-91Hua-LB.tdb | 1503.39 | BCC_A2 (x(V) 0.47894) + SIGMA_OLD (x(V) 0.4811) + SIGMA_D8B (x(V) 0.49183) |
| FeV-91Hua-LB.tdb | 868.45 | BCC_A2 (x(V) 0.1931) + SIGMA_OLD (x(V) 0.33709) + SIGMA_D8B (x(V) 0.34007) |
| FeV-91Hua-LB.tdb | 397.2 | SIGMA_D8B (x(V) 0.66924) + SIGMA_OLD (x(V) 0.72128) + BCC_A2 (x(V) 0.84729) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/FE/FE-V.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/FE/FE-V.json) · [CALPHAD hull FeV-12Guo](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-V--FeV-12Guo.json) · [CALPHAD hull FeV-83And](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-V--FeV-83And.json) · [CALPHAD hull FeV-91Har](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-V--FeV-91Har.json) · [CALPHAD hull FeV-91Hua-LB](https://data.orchid-project.org/hulls/calphad-sgte/FE/FE-V--FeV-91Hua-LB.json)

## 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](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Fe–V system (2)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| bee |  | -5.3 kJ/mol (basis unstated) | 1623 | experimental |  |  | [1] Huang 1991; _cites ref. 2_ | p. 4; `ORC-R3OI6XYIOO.21c8bb` | “For a SO-50 alloy and with the same structure of pure elements as reference give the following enthalpy of formation of the Fe-Mn states, the experiments alloy (1): -1 kJ/mol for liquid at 1873 K, -2 kJ/mol for fee at 1443 K; of the Fe-V alloy (2): -8.6 kJ/mol for liquid at 1873 K, -5.3 kJ/mol for bee at 1623 K.” |
| liquid |  | -8.6 kJ/mol (basis unstated) | 1873 | experimental |  |  | [1] Huang 1991; _cites ref. 2_ | p. 4; `ORC-R3OI6XYIOO.98e5dd` | “For a SO-50 alloy and with the same structure of pure elements as reference give the following enthalpy of formation of the Fe-Mn states, the experiments alloy (1): -1 kJ/mol for liquid at 1873 K, -2 kJ/mol for fee at 1443 K; of the Fe-V alloy (2): -8.6 kJ/mol for liquid at 1873 K, -5.3 kJ/mol for bee at 1623 K.” |

## Sources

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

1. Weiming Huang, A Thermodynamic Analysis of the Mn-V And Fe-Mn-V Systems, Calphad 15, 195-208 (1991). [doi:10.1016/0364-5916(91)90018-f](https://doi.org/10.1016/0364-5916%2891%2990018-f)

## 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). https://doi.org/10.5281/zenodo.23735569
- 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-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/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). https://doi.org/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.

```bibtex
@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}
}
```

---

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/).