# Al–Co–Fe system

> Al–Co–Fe system: 47 accepted literature values (phase equilibrium 30, formation 17) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

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

47 accepted literature values from 2 paper(s) (experimental 30, model 6, DFT 11); 0 calculated phase diagram(s). 1 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/AL-CO-FE.json) · [CSV](https://data.orchid-project.org/systems/AL-CO-FE.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CO-FE) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CO-FE.html) · [Markdown](https://data.orchid-project.org/systems/AL-CO-FE.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 30 |
| model | 6 |
| DFT | 11 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| phase equilibrium | 30 |
| formation | 17 |

## 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, Al–Co–Fe system (17)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| B2 |  | -48.26 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites NIST_ | Table 5, p. 5, row 3; `ORC-QNUMKGZ7LV` |  |
| B2 |  | -46.43 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites OQMD_ | Table 5, p. 5, row 2; `ORC-E7IBSAUYM2` |  |
| B2 |  | -45.27 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites materialsproject_ | Table 5, p. 5, row 1; `ORC-EVPW4FA53A` |  |
| B2 |  | -36.39 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites Breuer 2001_ [doi](https://doi.org/10.1007/s11663-001-0077-8) | Table 3, p. 3, row 12; `ORC-5WU45JPQVL` |  |
| B2 |  | -35.42 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites OQMD_ | Table 5, p. 5, row 5; `ORC-T5NIRDKAQ3` |  |
| B2 |  | -34.94 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites NIST_ | Table 3, p. 3, row 10; `ORC-KBJOMGSNDF` |  |
| B2 |  | -34.26 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites materialsproject_ | Table 5, p. 5, row 4; `ORC-5R3OQNIOKY` |  |
| B2 |  | -33.3 kJ/mol (basis unstated) |  | model |  |  | [1] Ostrowska 2019; _cites NIST_ | Table 5, p. 5, row 6; `ORC-3MYUYBWOGX` |  |
| B2 |  | -32.04 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites OQMD_ | Table 3, p. 3, row 9; `ORC-SINY4PBMNX` |  |
| B2 |  | -31.85 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites AFLOW_ | Table 3, p. 3, row 11; `ORC-2UMRNSAYZA` |  |
| B2 |  | -31.85 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites materialsproject_ | Table 3, p. 3, row 8; `ORC-D2EAHORLG3` |  |
| B2 |  | -6.27 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites OQMD_ | Table 4, p. 4, row 2; `ORC-AJYPCURNRY` |  |
| B2 |  | -5.79 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites materialsproject_ | Table 4, p. 4, row 1; `ORC-B4XWAFKFZL` |  |
| B2 |  | -5.79 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites AFLOW_ | Table 4, p. 4, row 4; `ORC-Z3SKRNAAGP` |  |
| B2 |  | -2.61 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites NIST_ | Table 4, p. 4, row 3; `ORC-A2ZOHYWEMM` |  |
| m-(Co,Fe)4Al13 |  | -16.22 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites NIST_ | Table 3, p. 3, row 2; `ORC-U6R2MU4PLH` |  |
| m-(Co,Fe)4Al13 |  | -14.77 kJ/mol (basis unstated) |  | DFT |  |  | [1] Ostrowska 2019; _cites materialsproject_ | Table 3, p. 3, row 1; `ORC-BZXFTEF2RW` |  |

## Other properties

### Phase equilibrium (30)

Table: Phase equilibrium, Al–Co–Fe system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.0333, Co 0.6645, Fe 0.3022_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 6; `ORC-6IGNE44BCF` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.3491, Co 0.5212, Fe 0.1298_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 14; `ORC-7KT6JBZ7IO` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.1921, Co 0.5071, Fe 0.3009_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 7; `ORC-AWDHLY2KXX` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.0528, Co 0.5489, Fe 0.3983_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 18; `ORC-DO5V4HNU6Q` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.0517, Co 0.6455, Fe 0.3028_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 10; `ORC-FHMQ6BXOHK` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.1884, Co 0.463, Fe 0.3486_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 12; `ORC-JFSDSBCC5A` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.1222, Co 0.1728, Fe 0.705_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 17; `ORC-JMALPS3X4M` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.1494, Co 0.053, Fe 0.7976_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 15; `ORC-PRV4W3ZITF` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.0491, Co 0.5058, Fe 0.4451_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 13; `ORC-QANNKXXE5K` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.2516, Co 0.5243, Fe 0.224_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 11; `ORC-SHVP4QTYEI` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.2568, Co 0.5188, Fe 0.2245_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 9; `ORC-TAXU6JHYK4` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.2901, Co 0.5607, Fe 0.1492_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 8; `ORC-VKUZTMSEVO` |  |
| Phase composition |  | 1073 | Phase 1; _Phase 1: Al 0.1863, Co 0.1083, Fe 0.7054_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 16; `ORC-WXDMRTWF4S` |  |
| Phase composition |  | 1073 | Phase 1 + Phase 2; _Phase 1: Al 0.0515, Co 0.8457, Fe 0.1028; Phase 2: Al 0.2924, Co 0.5953, Fe 0.1123_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 3; `ORC-655X47SXD4` |  |
| Phase composition |  | 1073 | Phase 1 + Phase 2; _Phase 1: Al 0.0458, Co 0.7797, Fe 0.1745; Phase 2: Al 0.1711, Co 0.6061, Fe 0.2228_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 1; `ORC-A5O2YA7YNP` |  |
| Phase composition |  | 1073 | Phase 1 + Phase 2; _Phase 1: Al 0.1251, Co 0.6231, Fe 0.2519; Phase 2: Al 0.0495, Co 0.7602, Fe 0.1904_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 4; `ORC-H2OMH37UCE` |  |
| Phase composition |  | 1073 | Phase 1 + Phase 2; _Phase 1: Al 0.0633, Co 0.7694, Fe 0.1673; Phase 2: Al 0.1887, Co 0.6047, Fe 0.2066_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 2; `ORC-WFJWYLGZPV` |  |
| Phase composition |  | 1073 | Phase 1 + Phase 2; _Phase 1: Al 0.0495, Co 0.7984, Fe 0.1522; Phase 2: Al 0.2504, Co 0.5913, Fe 0.1583_ | experimental | [2] Wang 2022 | Table 4, p. 8, row 5; `ORC-WKYCOM4HZ3` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 2; _Phase 1: Al 0.5077, Co 0.0335, Fe 0.4588; Phase 2: Al 0.6356, Co 0.0143, Fe 0.3501_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 1; `ORC-RJAOA7D5PU` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 2; _Phase 1: Al 0.5082, Co 0.065, Fe 0.4268; Phase 2: Al 0.6389, Co 0.0282, Fe 0.3329_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 2; `ORC-ZNAOUO7OKG` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 2 + Phase 3; _Phase 1: Al 0.511, Co 0.1564, Fe 0.3326; Phase 2: Al 0.6502, Co 0.0681, Fe 0.2816; Phase 3: Al 0.6895, Co 0.0956, Fe 0.215_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 3; `ORC-ZZTY7C2BSY` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 3; _Phase 1: Al 0.5041, Co 0.3676, Fe 0.1283; Phase 3: Al 0.6976, Co 0.1923, Fe 0.1101_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 5; `ORC-IRGYC72C2N` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 3; _Phase 1: Al 0.5098, Co 0.2577, Fe 0.2326; Phase 3: Al 0.6938, Co 0.1398, Fe 0.1665_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 4; `ORC-SR6VDHXT6Q` |  |
| Phase composition |  | 1273 | Phase 1 + Phase 3; _Phase 1: Al 0.5017, Co 0.4599, Fe 0.0384; Phase 3: Al 0.7006, Co 0.2543, Fe 0.0451_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 6; `ORC-YCVACCWYOQ` |  |
| Phase composition |  | 1343 | Phase 1; _Phase 1: Al 0.5214, Co 0.1527, Fe 0.3259_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 9; `ORC-N4UGHHI6VB` |  |
| Phase composition |  | 1343 | Phase 1; _Phase 1: Al 0.5121, Co 0.4503, Fe 0.0376_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 12; `ORC-V3VEDXWKGK` |  |
| Phase composition |  | 1343 | Phase 1 + Phase 2; _Phase 1: Al 0.5115, Co 0.0681, Fe 0.4203; Phase 2: Al 0.6436, Co 0.0323, Fe 0.3242_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 8; `ORC-HSVCNFJJ6M` |  |
| Phase composition |  | 1343 | Phase 1 + Phase 2; _Phase 1: Al 0.5097, Co 0.0374, Fe 0.4529; Phase 2: Al 0.6384, Co 0.0182, Fe 0.3434_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 7; `ORC-LOPDZKKFLR` |  |
| Phase composition |  | 1343 | Phase 1 + Phase 3; _Phase 1: Al 0.5244, Co 0.3372, Fe 0.1384; Phase 3: Al 0.7, Co 0.1884, Fe 0.1116_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 11; `ORC-7M3MOTPC7T` |  |
| Phase composition |  | 1343 | Phase 1 + Phase 3; _Phase 1: Al 0.5257, Co 0.2443, Fe 0.23; Phase 3: Al 0.6944, Co 0.1417, Fe 0.1639_ | experimental | [2] Wang 2022 | Table 3, p. 7, row 10; `ORC-JN73UILVEQ` |  |

## Sources

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

1. Marlena Ostrowska, Gabriele Cacciamani, Critical evaluation and thermodynamic modeling of the Al-Co-Fe system, Journal of Alloys and Compounds 794, 553-568 (2019). [doi:10.1016/j.jallcom.2019.04.170](https://doi.org/10.1016/j.jallcom.2019.04.170)
2. Jingjing Wang, Yu Zhang, Weisen Zheng, Xiao-Gang Lu, Thermodynamic and diffusion kinetic studies of the Co-Al–Fe system, J Mater Sci 57, 7343-7366 (2022). [doi:10.1007/s10853-022-07109-8](https://doi.org/10.1007/s10853-022-07109-8)

## 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 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_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/).