# Al–Mg–Si system

> Al–Mg–Si system: 59 accepted literature values (invariant reaction 59) 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-MG-SI.html · Markdown: https://data.orchid-project.org/systems/AL-MG-SI.md

59 accepted literature values from 1 paper(s) (experimental 22, model 37); 0 calculated phase diagram(s).

Data: [JSON](https://data.orchid-project.org/literature/systems/AL-MG-SI.json) · [CSV](https://data.orchid-project.org/systems/AL-MG-SI.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-MG-SI) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-MG-SI.html) · [Markdown](https://data.orchid-project.org/systems/AL-MG-SI.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 22 |
| model | 37 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 59 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Mg–Si system (59)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1218.75 | L -> Mg2Si + Si | L: Si 0.53; Mg2Si: Si 0.333; Si: Si 1 | experimental | [1] Tang 2012; _cites Geffken 1968_ | Table 3, p. 5, row 30; `ORC-AOCVSQK77G` |  |
| 1218.75 | L -> Mg2Si + Si | L: Si 0.535; Mg2Si: Si 0.333; Si: Si 1 | model | [1] Tang 2012; _cites Yuan 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.08.004) | Table 3, p. 5, row 28; `ORC-UINDIJS2AP` |  |
| 1217.95 | L -> Mg2Si + Si | L: Si 0.5296; Mg2Si: Si 0.333; Si: Si 1 | model | [1] Tang 2012 | Table 3, p. 5, row 29; `ORC-6KXCQFDPM2` |  |
| 911.75 | L -> (Mg)-hcp + Mg2Si | L: Si 0.0135; (Mg)-hcp: Si 0; Mg2Si: Si 0.333 | model | [1] Tang 2012; _cites Yuan 2009_ [doi](https://doi.org/10.1016/j.calphad.2009.08.004) | Table 3, p. 5, row 25; `ORC-IQO3WEF64M` |  |
| 910.15 | L -> (Mg)-hcp + Mg2Si | L: Si 0.013; (Mg)-hcp: Si 0; Mg2Si: Si 0.333 | experimental | [1] Tang 2012; _cites Geffken 1968_ | Table 3, p. 5, row 27; `ORC-WWL2DJ6ECI` |  |
| 908.15 | L -> (Mg)-hcp + Mg2Si | L: Si 0.0173; (Mg)-hcp: Si 0; Mg2Si: Si 0.333 | model | [1] Tang 2012 | Table 3, p. 5, row 26; `ORC-2U7IRYBK5A` |  |
| 870.15 | L -> (Al)-fcc + Mg2Si | L: Si 0.039 | experimental | [1] Tang 2012; _cites Barabash 2001_ [doi](https://doi.org/10.1007/s11669-001-0049-3) | Table 4, p. 6, row 6; `ORC-OKRWCCTG4H` |  |
| 868.15 | L -> (Al)-fcc + Mg2Si | L: Al 0.871, Mg 0.083, Si 0.046 | experimental | [1] Tang 2012; _cites Hanson 2012_ | Table 4, p. 6, row 5; `ORC-G4N5ANOJPZ` |  |
| 868.15 | L -> (Al)-fcc + Mg2Si |  | experimental | [1] Tang 2012; _cites Feufel 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902655-2) | Table 4, p. 6, row 3; `ORC-RCAHRDEYBX` |  |
| 867.9 | L -> (Al)-fcc + Mg2Si | L: Al 0.8571, Mg 0.1046, Si 0.0383 | model | [1] Tang 2012 | Table 4, p. 6, row 1; `ORC-Z6MUDSRGDC` |  |
| 867.15 | L -> (Al)-fcc + Mg2Si | L: Al 0.853, Mg 0.108, Si 0.039 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 7; `ORC-OPTXLQ74S7` |  |
| 866.8 | L -> (Al)-fcc + Mg2Si | L: Al 0.8561, Mg 0.1031, Si 0.0408 | model | [1] Tang 2012 | Table 4, p. 6, row 2; `ORC-7TQO6S6K4I` |  |
| 866.15 | L -> (Al)-fcc + Mg2Si |  | experimental | [1] Tang 2012; _cites Schurmann 1977_ | Table 4, p. 6, row 4; `ORC-ODHTZGWJFX` |  |
| 850.65 | L -> (Al)-fcc + Si | L: Si 0.1204; (Al)-fcc: Si 0.017; Si: Si 1 | model | [1] Tang 2012 | Table 3, p. 5, row 1; `ORC-ZBA2KHHDZZ` |  |
| 850.25 | L -> (Al)-fcc + Si | L: Si 0.122; Si: Si 1 | experimental | [1] Tang 2012; _cites Hayes 1993_ [doi](https://doi.org/10.1007/bf02671960) | Table 3, p. 5, row 3; `ORC-ACJMBPHE4W` |  |
| 850.15 | L -> (Al)-fcc + Si | L: Si 0.121; (Al)-fcc: Si 0.0175; Si: Si 1 | model | [1] Tang 2012 | Table 3, p. 5, row 2; `ORC-BQZXE6TFAL` |  |
| 833.6 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.8066, Mg 0.0549, Si 0.1385 | model | [1] Tang 2012 | Table 4, p. 6, row 8; `ORC-GQ7VQOCEOT` |  |
| 833.15 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.823, Mg 0.051, Si 0.126 | experimental | [1] Tang 2012; _cites Birchenall 1980_ [doi](https://doi.org/10.1007/bf02653497) | Table 4, p. 6, row 11; `ORC-VB3TN2LLQI` |  |
| 832.5 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.8068, Mg 0.0547, Si 0.1385 | model | [1] Tang 2012 | Table 4, p. 6, row 9; `ORC-QSZ5N36URG` |  |
| 831.15 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.805, Mg 0.049, Si 0.146 | experimental | [1] Tang 2012; _cites Hanson 2012_ | Table 4, p. 6, row 13; `ORC-JV6MZIJE6D` |  |
| 831.15 | L -> (Al)-fcc + (Si) + Mg2Si |  | experimental | [1] Tang 2012; _cites Feufel 1997_ [doi](https://doi.org/10.1016/s0925-8388%2896%2902655-2) | Table 4, p. 6, row 10; `ORC-RENT3ENLDY` |  |
| 830.15 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.815, Mg 0.054, Si 0.131 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 14; `ORC-XF5WGCBD2P` |  |
| 823.15 | L -> (Al)-fcc + (Si) + Mg2Si | L: Al 0.811, Mg 0.048, Si 0.141 | experimental | [1] Tang 2012; _cites Schurmann 1977_ | Table 4, p. 6, row 12; `ORC-X6UIHZUNDZ` |  |
| 735.65 | L -> γ + Mg2Si | L: Al 0.461, Mg 0.538, Si 0.001 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 17; `ORC-EOK4KXJPVE` |  |
| 733.5 | L -> γ + Mg2Si | L: Al 0.4619, Mg 0.5378, Si 3.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 16; `ORC-SMIEJUFQE7` |  |
| 733.2 | L -> γ + Mg2Si | L: Al 0.4576, Mg 0.542, Si 4.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 15; `ORC-MTOSPADLA5` |  |
| 724.6 | L -> β + Mg2Si | L: Al 0.6114, Mg 0.3884, Si 2.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 19; `ORC-C3JLWLJEDA` |  |
| 724.35 | L -> β + Mg2Si | L: Al 0.61, Mg 0.389, Si 0.001 | model | [1] Tang 2012; _cites Sebkova 1979_ | Table 4, p. 6, row 20; `ORC-YRH3CAMVEU` |  |
| 724.3 | L -> β + Mg2Si | L: Al 0.6114, Mg 0.3884, Si 2.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 18; `ORC-YW65EXMGRE` |  |
| 723.95 | L -> (Al)-fcc + β | L: Mg 0.3639; (Al)-fcc: Mg 0.166; β: Mg 0.3886 | model | [1] Tang 2012 | Table 3, p. 5, row 5; `ORC-IDY6HFGUVS` |  |
| 723.85 | L -> (Al)-fcc + β | L: Mg 0.3665; (Al)-fcc: Mg 0.1689; β: Mg 0.3886 | model | [1] Tang 2012 | Table 3, p. 5, row 4; `ORC-FOSTC5LFL7` |  |
| 723.8 | L -> (Al)-fcc + β + Mg2Si | L: Al 0.6358, Mg 0.364, Si 2.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 22; `ORC-OTWC3QDCJL` |  |
| 723.7 | L -> (Al)-fcc + β + Mg2Si | L: Al 0.6331, Mg 0.3666, Si 1.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 21; `ORC-LGTKPMZSAG` |  |
| 723.55 | L -> γ | L: Mg 0.4194; γ: Mg 0.4677; β: Mg 0.3886 | model | [1] Tang 2012 | Table 3, p. 5, row 8; `ORC-C6AI6WWSN7` |  |
| 723.5 | L -> β + γ + Mg2Si | L: Al 0.5812, Mg 0.4186, Si 2.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 28; `ORC-DQZLVFJSQG` |  |
| 723.15 | L -> (Al)-fcc + β + Mg2Si | L: Al 0.64, Mg 0.363, Si 0.001 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 26; `ORC-3RJ7F4PXVN` |  |
| 723.15 | L -> γ | L: Mg 0.4209; γ: Mg 0.4683; β: Mg 0.3886 | model | [1] Tang 2012 | Table 3, p. 5, row 7; `ORC-HFUHX2GK45` |  |
| 723.1 | L -> β + γ + Mg2Si | L: Al 0.5795, Mg 0.4204, Si 1.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 27; `ORC-5AE6UOGLVR` |  |
| 722.85 | L -> (Al)-fcc + β | L: Mg 0.368; (Al)-fcc: Mg 0.165; β: Mg 0.385 | experimental | [1] Tang 2012; _cites Schuermann 1981_ | Table 3, p. 5, row 6; `ORC-WPXEMQBGXU` |  |
| 722.65 | L -> γ | L: Mg 0.424; γ: Mg 0.48; β: Mg 0.3886 | experimental | [1] Tang 2012; _cites Liang 1998_ | Table 3, p. 5, row 9; `ORC-NJPUMLVP73` |  |
| 722.15 | L -> β + γ + Mg2Si | L: Al 0.574, Mg 0.425, Si 0.001 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 30; `ORC-J5VVMWIVZB` |  |
| 721.15 | L -> (Al)-fcc + β + Mg2Si | L: Al 0.6603, Mg 0.339, Si 7.000e-4 | experimental | [1] Tang 2012; _cites Hanson 2012_ | Table 4, p. 6, row 25; `ORC-AYMYLIV5D3` |  |
| 721.15 | L -> β + γ + Mg2Si |  | experimental | [1] Tang 2012; _cites Valdes 2006_ [doi](https://doi.org/10.4028/www.scientific.net/msf.508.621) | Table 4, p. 6, row 29; `ORC-FOEJHZ4WLI` |  |
| 721.15 | L -> (Al)-fcc + β + Mg2Si |  | experimental | [1] Tang 2012; _cites Schurmann 1977_ | Table 4, p. 6, row 23; `ORC-WAOFRFBV6U` |  |
| 711.55 | L -> γ + (Mg)-hcp | L: Mg 0.7037; γ: Mg 0.6211; (Mg)-hcp: Mg 0.8831 | model | [1] Tang 2012 | Table 3, p. 5, row 10; `ORC-NVXM5QUT4V` |  |
| 711.45 | L -> γ + (Mg)-hcp | L: Mg 0.6974; γ: Mg 0.6112; (Mg)-hcp: Mg 0.8663 | model | [1] Tang 2012 | Table 3, p. 5, row 11; `ORC-GRMTHQYI2G` |  |
| 711.4 | L -> (Mg)-hcp + γ + Mg2Si | L: Al 0.3015, Mg 0.698, Si 5.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 32; `ORC-CVKEWJ5HOW` |  |
| 711.4 | L -> (Mg)-hcp + γ + Mg2Si | L: Al 0.2952, Mg 0.7043, Si 5.000e-4 | model | [1] Tang 2012 | Table 4, p. 6, row 31; `ORC-EQMNT7HUEJ` |  |
| 711.15 | L -> γ + (Mg)-hcp | L: Mg 0.692; γ: Mg 0.595; (Mg)-hcp: Mg 0.885 | experimental | [1] Tang 2012; _cites Schuermann 1981_ | Table 3, p. 5, row 12; `ORC-7KIY4CNMVH` |  |
| 709.15 | L -> (Mg)-hcp + γ + Mg2Si | L: Al 0.3, Mg 0.699, Si 0.001 | experimental | [1] Tang 2012; _cites Valdes 2006_ [doi](https://doi.org/10.4028/www.scientific.net/msf.508.621) | Table 4, p. 6, row 34; `ORC-O76TQCYUPS` |  |
| 708.75 | L -> (Mg)-hcp + γ + Mg2Si | L: Al 0.309, Mg 0.69, Si 0.001 | model | [1] Tang 2012; _cites Kumar 2003_ | Table 4, p. 6, row 35; `ORC-7AL6EWARIJ` |  |
| 708.15 | L -> (Al)-fcc + β + Mg2Si | L: Al 0.653, Mg 0.345, Si 0.002 | experimental | [1] Tang 2012; _cites Rokhlin 1988_ | Table 4, p. 6, row 24; `ORC-SLZKO3BSPT` |  |
| 707.15 | L -> (Mg)-hcp + γ + Mg2Si | L: Al 0.323, Mg 0.675, Si 0.002 | experimental | [1] Tang 2012; _cites Schurmann 1977_ | Table 4, p. 6, row 33; `ORC-NA4YTXUQUY` |  |
| 701.05 | β + γ -> ε | β: Mg 0.3886; γ: Mg 0.4828; ε: Mg 0.4339 | model | [1] Tang 2012 | Table 3, p. 5, row 13; `ORC-VRUXE2SALP` |  |
| 700.95 | β + γ -> ε | β: Mg 0.3836; γ: Mg 0.4823; ε: Mg 0.4339 | model | [1] Tang 2012 | Table 3, p. 5, row 14; `ORC-AIM6LXPBMC` |  |
| 700.15 | β + γ -> ε | β: Mg 0.3836; γ: Mg 0.482; ε: Mg 0.4339 | experimental | [1] Tang 2012; _cites Czeppe 2003_ [doi](https://doi.org/10.1361/105497103770330550) | Table 3, p. 5, row 15; `ORC-SYXCWFE27J` |  |
| 524.25 | ε -> β + γ | ε: Mg 0.4339; β: Mg 0.3836; γ: Mg 0.5494 | model | [1] Tang 2012 | Table 3, p. 5, row 17; `ORC-VBBVYZUGHQ` |  |
| 523.45 | ε -> β + γ | ε: Mg 0.4339; β: Mg 0.3836; γ: Mg 0.5505 | model | [1] Tang 2012 | Table 3, p. 5, row 16; `ORC-XNTHQF6BSC` |  |
| 523.15 | ε -> β + γ | ε: Mg 0.4339; β: Mg 0.3836; γ: Mg 0.536 | experimental | [1] Tang 2012; _cites Liang 1998_ | Table 3, p. 5, row 18; `ORC-IK2WNDHBPK` |  |

## Sources

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

1. Ying Tang, Yong Du, Lijun Zhang, Xiaoming Yuan, George Kaptay, Thermodynamic description of the Al–Mg–Si system using a new formulation for the temperature dependence of the excess Gibbs energy, Thermochimica Acta 527, 131-142 (2012). [doi:10.1016/j.tca.2011.10.017](https://doi.org/10.1016/j.tca.2011.10.017)

## 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/).