# Al–Cr–Ni system

> Al–Cr–Ni system: 26 accepted literature values (activity / EMF / Gibbs energy 12, formation 9, invariant reaction 5) 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-CR-NI.html · Markdown: https://data.orchid-project.org/systems/AL-CR-NI.md

26 accepted literature values from 1 paper(s) (experimental 8, model 18); 0 calculated phase diagram(s). 3 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-CR-NI.json) · [CSV](https://data.orchid-project.org/systems/AL-CR-NI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CR-NI) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CR-NI.html) · [Markdown](https://data.orchid-project.org/systems/AL-CR-NI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 8 |
| model | 18 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 5 |
| formation | 9 |
| activity / EMF / Gibbs energy | 12 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Cr–Ni system (5)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1622 | liq. + γ' -> γ + β | liq.: Cr 0.045, Ni 0.719; γ': Cr 0.029, Ni 0.737; γ: Cr 0.042, Ni 0.754; β: Cr 0.024, Ni 0.692 | model | [1] Dupin 2001 | Table 2, p. 10, row 1; `ORC-MXDCAKD6NK` |  |
| 1593 | liq -> γ + β + α |  | experimental | [1] Dupin 2001; _cites ref. 52Tay_ | Table 2, p. 10, row 4; `ORC-3QRNJ56WZ2` |  |
| 1573 | liq -> γ + β + α |  | experimental | [1] Dupin 2001; _cites ref. 55Kor_ | Table 2, p. 10, row 5; `ORC-NREC5MC6VM` |  |
| 1556 | liq -> γ + β + α | γ: Cr 0.362, Ni 0.509; β: Cr 0.145, Ni 0.552; α: Cr 0.799, Ni 0.169; liq.: Cr 0.325, Ni 0.501 | model | [1] Dupin 2001 | Table 2, p. 10, row 3; `ORC-HAYUX6TBY3` |  |
| 1269 | γ + β -> γ' + α | γ: Cr 0.281, Ni 0.602; β: Cr 0.096, Ni 0.598; γ': Cr 0.108, Ni 0.68; α: Cr 0.963, Ni 0.035 | model | [1] Dupin 2001 | Table 2, p. 10, row 6; `ORC-OMRPOBPL7Z` |  |

## 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–Cr–Ni system (9)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| γ' |  | -36.7 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 1; `ORC-F2EFBMHPVX.9f141e` |  |
| γ' |  | -34.7 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 5; `ORC-26FQMKOPPW.c16168` |  |
| γ' |  | -32.4 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 9; `ORC-CELWG3WBAM.3ce1ff` |  |
| γ' + γ |  | -36.7 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 2; `ORC-ZGXB3J2NFA.ae40d0` |  |
| γ' + γ |  | -35 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 6; `ORC-4G2W7G3T4U.d5f2ee` |  |
| γ' + γ |  | -32.8 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 10; `ORC-XKDTU6TUQM.cc29af` |  |
| γ' + γ + α |  | -36.7 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 3; `ORC-GTPCYHFBYT.ee2d87` |  |
| γ' + γ + α |  | -35.6 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 7; `ORC-IKQ4CM6YNS.886d19` |  |
| γ' + γ + α |  | -34 kJ/mol (basis unstated) | 298.15 | model |  |  | [1] Dupin 2001 | Table 4, p. 17, row 11; `ORC-NJ3EK2GTRP.df8252` |  |

## Other properties

### Activity / EMF / Gibbs energy (12)

Table: Activity / EMF / Gibbs energy, Al–Cr–Ni system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Gibbs energy; _printed: ΔG^φ_ | -9.2 kJ | 1423 | α | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 12; `ORC-6MO2U67NH2` |  |
| Gibbs energy; _printed: ΔG^φ_ | -2.9 kJ | 1423 | α | model | [1] Dupin 2001 | Table 3, p. 17, row 11; `ORC-KLRPPTDMXG` |  |
| Gibbs energy; _printed: ΔG^φ_ | -34.7 kJ | 1423 | β | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 6; `ORC-6JDMUTKQ5E` |  |
| Gibbs energy; _printed: ΔG^φ_ | -38.3 kJ | 1423 | β | model | [1] Dupin 2001 | Table 3, p. 17, row 9; `ORC-DKPE2JPCY3` |  |
| Gibbs energy; _printed: ΔG^φ_ | -37.8 kJ | 1423 | β | model | [1] Dupin 2001 | Table 3, p. 17, row 5; `ORC-DLAARA3TX6` |  |
| Gibbs energy; _printed: ΔG^φ_ | -37.9 kJ | 1423 | β | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 10; `ORC-VXEMNHFSVC` |  |
| Gibbs energy; _printed: ΔG^φ_ | -20.7 kJ | 1423 | γ | model | [1] Dupin 2001 | Table 3, p. 17, row 7; `ORC-2WCYVJFQWZ` |  |
| Gibbs energy; _printed: ΔG^φ_ | -25.3 kJ | 1423 | γ | model | [1] Dupin 2001 | Table 3, p. 17, row 1; `ORC-BY56XTJWWA` |  |
| Gibbs energy; _printed: ΔG^φ_ | -24.9 kJ | 1423 | γ | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 2; `ORC-GLPAC3TG3F` |  |
| Gibbs energy; _printed: ΔG^φ_ | -23.6 kJ | 1423 | γ | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 8; `ORC-PWPILIANWO` |  |
| Gibbs energy; _printed: ΔG^φ_ | -30.3 kJ | 1423 | γ' | experimental | [1] Dupin 2001; _cites ref. 85Ofo_ | Table 3, p. 17, row 4; `ORC-62QEBJE37C` |  |
| Gibbs energy; _printed: ΔG^φ_ | -31.1 kJ | 1423 | γ' | model | [1] Dupin 2001 | Table 3, p. 17, row 3; `ORC-SACEICABJO` |  |

## Sources

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

1. N. Dupin, I. Ansara, B. Sundman, Thermodynamic re-assessment of the ternary system Al-Cr-Ni, Calphad 25, 279-298 (2001). [doi:10.1016/s0364-5916(01)00049-9](https://doi.org/10.1016/s0364-5916%2801%2900049-9)

## 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/).