# Al–Cr–Si system

> Al–Cr–Si system: 68 accepted literature values (invariant reaction 52, crystal structure 16) 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-SI.html · Markdown: https://data.orchid-project.org/systems/AL-CR-SI.md

68 accepted literature values from 1 paper(s) (experimental 20, model 48); 0 calculated phase diagram(s). 2 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-SI.json) · [CSV](https://data.orchid-project.org/systems/AL-CR-SI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CR-SI) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CR-SI.html) · [Markdown](https://data.orchid-project.org/systems/AL-CR-SI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 20 |
| model | 48 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 52 |
| crystal structure | 16 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Cr–Si system (52)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1780.15 | L + βCr5Si3 -> Cr3Si + αCr5Si3 |  | model | [1] Hu 2013 | Table 6, p. 10, row 2; `ORC-PRQ24DV6KN` |  |
| 1774.15 | L + βCr5Si3 -> Cr3Si + αCr5Si3 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 1; `ORC-2PKFNRTK2K` |  |
| 1633.15 | L + CrSi -> CrSi2 + αCr5Si3 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 4; `ORC-E2BQUXTHLV` |  |
| 1633.15 | L + CrSi -> CrSi2 + αCr5Si3 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 3; `ORC-K4Z5QHZRAH` |  |
| 1593.15 | L + CrSi -> CrSi2 + αCr5Si3 |  | model | [1] Hu 2013 | Table 6, p. 10, row 5; `ORC-YX2XQV4M47` |  |
| 1571.15 | L + (Cr) -> Cr3Si + γ-H |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 6; `ORC-XFPHOIORLV` |  |
| 1568.15 | L + (Cr) -> Cr3Si + γ-H |  | model | [1] Hu 2013 | Table 6, p. 10, row 8; `ORC-PH2IKTK4RP` |  |
| 1538.15 | L + (Cr) -> Cr3Si + γ-H |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 7; `ORC-NOZT4LRN6M` |  |
| 1521.15 | L + Cr3Si -> αCr5Si3 + γ-H |  | model | [1] Hu 2013 | Table 6, p. 10, row 11; `ORC-AWYXLQ62DC` |  |
| 1467.15 | L + Cr3Si -> αCr5Si3 + γ-H |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 10; `ORC-ZBLU5Z3EDM` |  |
| 1462.15 | L + Cr3Si -> αCr5Si3 + γ-H |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 9; `ORC-SUOHVUNZEQ` |  |
| 1461.15 | L + αCr5Si3 -> CrSi2 + γ-H |  | model | [1] Hu 2013 | Table 6, p. 10, row 13; `ORC-J772MM4RHX` |  |
| 1447.15 | L + CrSi2 + γ-H -> τ4 |  | model | [1] Hu 2013 | Table 6, p. 10, row 15; `ORC-F7XN6FOAXJ` |  |
| 1381.15 | L + αCr5Si3 -> CrSi2 + γ-H |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 12; `ORC-M3IFVYSSQ6` |  |
| 1380.15 | L + CrSi2 + γ-H -> τ4 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 14; `ORC-FTCNCIP3TG` |  |
| 1340.15 | L + γ-H + τ4 -> τ3 |  | model | [1] Hu 2013 | Table 6, p. 10, row 18; `ORC-LEFUTPG2CC` |  |
| 1339.15 | L + τ4 -> τ3 + CrSi2 |  | model | [1] Hu 2013 | Table 6, p. 10, row 20; `ORC-3NTSN7WLHA` |  |
| 1331.15 | L + γ-H + τ4 -> τ3 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 17; `ORC-CKDCSVJZT2` |  |
| 1323.15 | L + τ3 + γ-H -> Al4Cr |  | model | [1] Hu 2013 | Table 6, p. 10, row 23; `ORC-3VIZJWNX4Z` |  |
| 1320.15 | L + τ4 -> τ3 + CrSi2 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 19; `ORC-B7ZHFDZW7Z` |  |
| 1314.15 | L + γ-H -> Al4Cr + γ-L |  | model | [1] Hu 2013 | Table 6, p. 10, row 24; `ORC-4XP7HJYBY6` |  |
| 1314.15 | L + γ-H + τ4 -> τ3 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 16; `ORC-AJXK7N6FFC` |  |
| 1309.15 | L + τ3 + γ-H -> Al4Cr |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 21; `ORC-EZP5BHBOBC` |  |
| 1308.15 | L + τ3 + γ-H -> Al4Cr |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 22; `ORC-O4Z73VUTAL` |  |
| 1264.15 | L + τ3 -> Al4Cr + CrSi2 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 26; `ORC-EN32FMDT25` |  |
| 1256.15 | L + τ3 -> Al4Cr + CrSi2 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 25; `ORC-F4G723WBWB` |  |
| 1209.15 | L + τ3 -> Al4Cr + CrSi2 |  | model | [1] Hu 2013 | Table 6, p. 10, row 27; `ORC-4AZ6EJG2C6` |  |
| 1081.15 | L + Al4Cr + CrSi2 -> τ1 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 31; `ORC-2FX5CLFRMG` |  |
| 1079.15 | L + Al4Cr + CrSi2 -> τ1 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 30; `ORC-M7NAGL4IV7` |  |
| 1077.15 | L + Al4Cr + CrSi2 -> τ1 |  | model | [1] Hu 2013 | Table 6, p. 10, row 32; `ORC-OAPNIO3ZNT` |  |
| 1058.15 | L + Al4Cr -> τ1 + Al5Cr |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 34; `ORC-O7M74QD664` |  |
| 1045.15 | L + Al5Cr -> τ1 + Al45Cr7 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 41; `ORC-L7L62NYQMY` |  |
| 1031.15 | L + Al4Cr -> τ1 + Al5Cr |  | model | [1] Hu 2013 | Table 6, p. 10, row 36; `ORC-5GOW3MNPNA` |  |
| 995.15 | L + CrSi2 -> τ1 + (Si) |  | model | [1] Hu 2013 | Table 6, p. 10, row 39; `ORC-R3DZGJIQZA` |  |
| 988.15 | L + Al4Cr -> τ1 + Al5Cr |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 35; `ORC-A66WQC2MGP` |  |
| 983.15 | L + Al4Cr + CrSi2 -> τ1 |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | Table 6, p. 10, row 28; `ORC-Q77XPJGT6N` |  |
| 983.15 | L + Al4Cr + CrSi2 -> τ1 |  | experimental | [1] Hu 2013; _cites Gupta 2004_ [doi](https://doi.org/10.1016/j.matchar.2004.06.010) | Table 6, p. 10, row 29; `ORC-WGAMV7NDM6` |  |
| 983.15 | peritectic: L + Al5 Cr + CrSi2 ↔ ␣ |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | p. 3; `ORC-YCC7OVX6HV` | “Meanwhile, Esslinger et al. \[54\] investigated the phase transformation of the ␣ phase and found that the formation of the ␣ phase was via the peritectic reaction L + Al5 Cr + CrSi2 ↔ ␣ at 710 ◦ C.” |
| 975.15 | L + Al5Cr -> τ1 + Al45Cr7 |  | model | [1] Hu 2013 | Table 6, p. 10, row 43; `ORC-TAWXPXVJ2P` |  |
| 966.15 | L + Al5Cr -> τ1 + Al45Cr7 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 42; `ORC-YE5L7VD4XP` |  |
| 953.15 | L + Al4Cr -> τ1 + Al5Cr |  | experimental | [1] Hu 2013; _cites Gupta 2004_ [doi](https://doi.org/10.1016/j.matchar.2004.06.010) | Table 6, p. 10, row 33; `ORC-2NV2PDMBFN` |  |
| 953.15 | L + Al5Cr -> τ1 + Al45Cr7 |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | Table 6, p. 10, row 40; `ORC-FYJNELPFFG` |  |
| 908.15 | L + Al45Cr7 -> τ1 + (Al) |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 46; `ORC-VOQ7JY5BPE` |  |
| 907.15 | L + Al45Cr7 -> τ1 + (Al) |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 45; `ORC-MAEJSHQC2R` |  |
| 898.15 | L + Al45Cr7 -> τ1 + (Al) |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | Table 6, p. 10, row 44; `ORC-Y6POT6H4RD` |  |
| 888.15 | L + Al45Cr7 -> τ1 + (Al) |  | model | [1] Hu 2013 | Table 6, p. 10, row 47; `ORC-YOEQSEBTXR` |  |
| 881.15 | L + CrSi2 -> τ1 + (Si) |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 38; `ORC-XSPE5CEKSF` |  |
| 863.15 | L + CrSi2 -> τ1 + (Si) |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | Table 6, p. 10, row 37; `ORC-TNZCJPNE6M` |  |
| 850.15 | L -> (Al) + (Si) + τ1 |  | model | [1] Hu 2013 | Table 6, p. 10, row 51; `ORC-IHZVIP754S` |  |
| 850.15 | L -> (Al) + (Si) + τ1 |  | model | [1] Hu 2013; _cites Liang 2009_ [doi](https://doi.org/10.1007/s11669-009-9572-4) | Table 6, p. 10, row 50; `ORC-L66LRSNA52` |  |
| 848.15 | L -> (Al) + (Si) + τ1 |  | experimental | [1] Hu 2013; _cites Esslinger 1965_ | Table 6, p. 10, row 48; `ORC-7ZVD445ZTP` |  |
| 847.15 | L -> (Al) + (Si) + τ1 |  | experimental | [1] Hu 2013; _cites Chen 2008_ | Table 6, p. 10, row 49; `ORC-WVJILW2S3R` |  |

## Other properties

### Crystal structure (16)

Table: Crystal structure, Al–Cr–Si system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Lattice a | 10.903 Å |  | τ1 | model | [1] Hu 2013 | Table 3, p. 4, row 15; `ORC-WNWKVYJDOZ.19b7ff` |  |
| Lattice a | 7.508 Å |  | τ2 | model | [1] Hu 2013 | Table 3, p. 4, row 17; `ORC-YUSINMPU3L.41f1fc` |  |
| Lattice a | 4.05 Å | 298.15 | (Al); _alloy: Cr 0, Si 0_ | model | [1] Hu 2013; _cites Massalski 1996_ | Table 3, p. 4, row 1; `ORC-4AFCH7JW4S.16fbac` |  |
| Lattice a | 9.104 Å | 298.15 | γ-H; _alloy: Cr 0.42_ | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 9; `ORC-K6R374CZHJ.4fdeb0` |  |
| Lattice a | 12.719 Å | 298.15 | γ-L; _alloy: Cr 0.42_ | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 10; `ORC-WBZT5FOEKC.62bdee` |  |
| Lattice a | 10.927 Å | 298.15 | τ1 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 14; `ORC-Y4NKGAKJ5F.180ebc` |  |
| Lattice a | 7.535 Å | 298.15 | τ2 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 16; `ORC-UWYP3Z4LMP.4916d4` |  |
| Lattice a | 5.126 Å | 298.15 | τ3 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 18; `ORC-ATK3IGN5IM.3abcec` |  |
| Lattice a | 14.842 Å | 298.15 | τ4 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 19; `ORC-F7SQUYCL5I.28668d` |  |
| Lattice b | 8.98 Å | 298.15 | τ3 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 18; `ORC-ATK3IGN5IM.7066ae` |  |
| Lattice b | 12.452 Å | 298.15 | τ4 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 19; `ORC-F7SQUYCL5I.1253d0` |  |
| Lattice c | 7.819 Å |  | τ2 | model | [1] Hu 2013 | Table 3, p. 4, row 17; `ORC-YUSINMPU3L.6bfd56` |  |
| Lattice c | 7.936 Å | 298.15 | γ-L; _alloy: Cr 0.42_ | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 10; `ORC-WBZT5FOEKC.9001f9` |  |
| Lattice c | 7.839 Å | 298.15 | τ2 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 16; `ORC-UWYP3Z4LMP.6e86b1` |  |
| Lattice c | 5.047 Å | 298.15 | τ3 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 18; `ORC-ATK3IGN5IM.92ed66` |  |
| Lattice c | 12.501 Å | 298.15 | τ4 | model | [1] Hu 2013; _cites Chen 2008_ | Table 3, p. 4, row 19; `ORC-F7SQUYCL5I.777271` |  |

## Sources

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

1. Biao Hu, Wei-Wei Zhang, Yingbiao Peng, Yong Du, Shuhong Liu, Yuelan Zhang, Thermodynamic reassessment of the Al–Cr–Si system with the refined description of the Al–Cr system, Thermochimica Acta 561, 77-90 (2013). [doi:10.1016/j.tca.2013.03.033](https://doi.org/10.1016/j.tca.2013.03.033)

## 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/).