# Al–Ca–Mg system

> Al–Ca–Mg system: 53 accepted literature values (invariant reaction 34, phase transition 19) 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-CA-MG.html · Markdown: https://data.orchid-project.org/systems/AL-CA-MG.md

53 accepted literature values from 1 paper(s) (experimental 10, model 22, unspecified 21); 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-CA-MG.json) · [CSV](https://data.orchid-project.org/systems/AL-CA-MG.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AL-CA-MG) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AL-CA-MG.html) · [Markdown](https://data.orchid-project.org/systems/AL-CA-MG.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 10 |
| model | 22 |
| unspecified | 21 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 34 |
| phase transition | 19 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Al–Ca–Mg system (34)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1008 | other: L -> Mg2Ca+Al2Ca | L: Al 0.41, Ca 0.36, Mg 0.23 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 21; `ORC-JDU7MW5DRP` |  |
| 912.1 | other: L -> Mg2Ca+Al2Ca | L: Al 0.17, Ca 0.334, Mg 0.496 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 22; `ORC-26DH7HHUEX` |  |
| 902.96 | other: L -> Mg2Ca+Al2Ca | L: Al 0.207, Ca 0.337, Mg 0.456 | model | [1] ISLAM 2005 | Table VI, p. 10, row 20; `ORC-FJDNY5RCJV` |  |
| 829.2 | peritectic: L+ Al2Ca -> Al14Ca13+ Mg2Ca | L: Al 0.263, Ca 0.542, Mg 0.195 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 35; `ORC-2ML4W6HM2O` |  |
| 823.89 | peritectic: L+ Al2Ca -> Al14Ca13+ Mg2Ca | L: Al 0.277, Ca 0.539, Mg 0.184 | model | [1] ISLAM 2005 | Table VI, p. 10, row 33; `ORC-TSEQ4Z6BKE` |  |
| 815 | other: L -> Al2Ca+ (Mg) | L: Al 0.114, Ca 0.054, Mg 0.832 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 28; `ORC-MB3OCFMMVY` |  |
| 808 | other: L -> Al2Ca+ (Mg) |  | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 24; `ORC-GTC3KRJHIX` |  |
| 808 | other: L -> Al2Ca+ (Mg) |  | unspecified | [1] ISLAM 2005; _cites ref. 38_ | Table VI, p. 10, row 27; `ORC-XQLACN56AA` |  |
| 783 | eutectic: L -> Mg2Ca + Al2Ca + (Mg) | L: Al 0.09, Ca 0.12, Mg 0.79 | unspecified | [1] ISLAM 2005; _cites ref. 37_ | Table VI, p. 10, row 8; `ORC-RAOAMNLV7G` |  |
| 773.88 | other: L -> Al2Ca+ (Mg) | L: Al 0.147, Ca 0.075, Mg 0.778 | model | [1] ISLAM 2005 | Table VI, p. 10, row 23; `ORC-NJFKZWF3WI` |  |
| 771.8 | other: L -> Mg2Ca + Al3Ca8 | L: Al 0.2, Ca 0.627, Mg 0.173 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 19; `ORC-OJY73MW77Q` |  |
| 770.2 | eutectic: L -> Mg2Ca + Al2Ca + (Mg) | L: Al 0.05, Ca 0.11, Mg 0.84 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 9; `ORC-GAMONRGLSX` |  |
| 769.4 | eutectic: L -> Mg2Ca + Al3Ca8 + Al14Ca13 | L: Al 0.235, Ca 0.612, Mg 0.153 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 6; `ORC-FKF6ZPXMVO` |  |
| 768.11 | other: L -> Mg2Ca + Al3Ca8 | L: Al 0.215, Ca 0.632, Mg 0.153 | model | [1] ISLAM 2005 | Table VI, p. 10, row 17; `ORC-P7V7QW6YRG` |  |
| 765 | other: L -> Mg2Ca + Al3Ca8 | L: Al 0.26, Ca 0.64, Mg 0.1 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 18; `ORC-XQSFTVKAVI` |  |
| 764.19 | eutectic: L -> Mg2Ca + Al3Ca8 + Al14Ca13 | L: Al 0.255, Ca 0.612, Mg 0.133 | model | [1] ISLAM 2005 | Table VI, p. 10, row 4; `ORC-WPKS22JWT2` |  |
| 761 | eutectic: L -> Mg2Ca + Al3Ca8 + Al14Ca13 | L: Al 0.28, Ca 0.64, Mg 0.08 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 5; `ORC-TUP6LM4ZLT` |  |
| 757 | peritectic: L+ Al2Ca -> Al14Ca13+ Mg2Ca | L: Al 0.29, Ca 0.58, Mg 0.13 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 34; `ORC-H2GTR27VSK` |  |
| 754.72 | eutectic: L -> Mg2Ca + Al2Ca + (Mg) | L: Al 0.092, Ca 0.109, Mg 0.799 | model | [1] ISLAM 2005 | Table VI, p. 10, row 7; `ORC-AJMNWJ7RHV` |  |
| 732.5 | other: L -> Al2Ca + γ | L: Al 0.453, Ca 0.006, Mg 0.541 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 31; `ORC-C4UEJH55SC` |  |
| 723.8 | other: L -> Al2Ca + γ | L: Al 0.423, Ca 0.013, Mg 0.565 | model | [1] ISLAM 2005 | Table VI, p. 10, row 29; `ORC-O3EL5NLI2Q` |  |
| 720.4 | eutectic: L -> Al4Ca+ (Al)+ β | L: Al 0.643, Ca 0.006, Mg 0.351 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 16; `ORC-V6U2SOYILA` |  |
| 718.37 | other: L -> Al2Ca + β | L: Al 0.613, Ca 0.015, Mg 0.372 | model | [1] ISLAM 2005 | Table VI, p. 10, row 32; `ORC-BXUH36WZXF` |  |
| 717.39 | peritectic: L+ Al2Ca -> Al4Ca+ β | L: Al 0.633, Ca 0.011, Mg 0.356 | model | [1] ISLAM 2005 | Table VI, p. 10, row 36; `ORC-3KNERX2TP3` |  |
| 717 | other: L -> Al2Ca + γ | L: Al 0.48, Ca 0.03, Mg 0.49 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 30; `ORC-FCUVQ5NI2U` |  |
| 717 | eutectic: L -> Al4Ca+ (Al)+ β | L: Al 0.642, Ca 0.011, Mg 0.347 | model | [1] ISLAM 2005 | Table VI, p. 10, row 14; `ORC-YNHA2JDFFL` |  |
| 715.92 | eutectic: L -> Al2Ca + γ + β | L: Al 0.577, Ca 0.011, Mg 0.412 | model | [1] ISLAM 2005 | Table VI, p. 10, row 13; `ORC-QGNS4QPVTV` |  |
| 715 | eutectic: L -> Al4Ca+ (Al)+ β | L: Al 0.64, Ca 0.02, Mg 0.34 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 15; `ORC-REFJHUE2OM` |  |
| 710.54 | eutectic: L -> Mg2Ca + Ca-fcc + Al3Ca8 | L: Al 0.032, Ca 0.716, Mg 0.252 | model | [1] ISLAM 2005 | Table VI, p. 10, row 1; `ORC-YD6C7VLES4` |  |
| 706.4 | eutectic: L -> γ + Al2Ca + (Mg) | L: Al 0.313, Ca 0.005, Mg 0.682 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 12; `ORC-2IZVGR4XCJ` |  |
| 703.1 | eutectic: L -> Mg2Ca + Ca-fcc + Al3Ca8 | L: Al 0.049, Ca 0.719, Mg 0.232 | unspecified | [1] ISLAM 2005; _cites ref. 40_ | Table VI, p. 10, row 3; `ORC-SJUNJPND2W` |  |
| 701.5 | eutectic: L -> γ + Al2Ca + (Mg) | L: Al 0.316, Ca 0.012, Mg 0.672 | model | [1] ISLAM 2005 | Table VI, p. 10, row 10; `ORC-JLGH2QQGDE` |  |
| 697 | eutectic: L -> γ + Al2Ca + (Mg) | L: Al 0.33, Ca 0.02, Mg 0.65 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 11; `ORC-62RCQUUM53` |  |
| 683 | eutectic: L -> Mg2Ca + Ca-fcc + Al3Ca8 | L: Al 0.13, Ca 0.68, Mg 0.19 | unspecified | [1] ISLAM 2005; _cites ref. 5_ | Table VI, p. 10, row 2; `ORC-UPA5UECR5H` |  |

## Other properties

### Phase transition (19)

Table: Phase transition, Al–Ca–Mg system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 443.15 K | 443.15 | Al2Ca+(Mg)/Al2Ca+(Mg) + γ; _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 15; `ORC-BAQOIBGLTI` |  |
| Phase transition | 700.15 K | 700.15 | Al2Ca+(Mg)+L/(Mg)+ Al2Ca+ γ; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 7; `ORC-VEJFYBR7MF` |  |
| Phase transition | 704.15 K | 704.15 | Sample 1 DSC cooling; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 4; `ORC-QQ5JFVSWAY` |  |
| Phase transition | 716.15 K | 716.15 | Sample 1 DSC heating; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 3; `ORC-3GJFPKPGMH` |  |
| Phase transition | 718.52 K | 718.52 | Sample 3 DSC cooling; _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 16; `ORC-YBV5MAOTAP` |  |
| Phase transition | 753.15 K | 753.15 | L/L+Mg2Ca; _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 19; `ORC-5US6MMXSLX` |  |
| Phase transition | 758.15 K | 758.15 | (Mg)+L/Al2Ca+(Mg)+L; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 6; `ORC-BTI7CW2TXY` |  |
| Phase transition | 776.15 K | 776.15 | L+Mg2Ca/L+Mg2Ca+(Mg); _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 20; `ORC-FSZIAM2V33` |  |
| Phase transition | 777.15 K | 777.15 | L+ Al2Ca/Al2Ca+(Mg); _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 14; `ORC-LCYKW5HTMW` |  |
| Phase transition | 794.47 K | 794.47 | Sample 3 DSC cooling; _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 17; `ORC-W5T6FHTIHI` |  |
| Phase transition | 796.15 K | 796.15 | Sample 2 DSC cooling; _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 10; `ORC-UOSC2LAVGI` |  |
| Phase transition | 808.15 K | 808.15 | Sample 2 DSC heating; _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 9; `ORC-4SJR5P7CHS` |  |
| Phase transition | 812.15 K | 812.15 | L/(Mg)+L; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 5; `ORC-YNIWQNX34D` |  |
| Phase transition | 823.15 K | 823.15 | Sample 1 DSC cooling; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 2; `ORC-CVOZ3P4ED7` |  |
| Phase transition | 828.15 K | 828.15 | Sample 1 DSC heating; _alloy: Al 0.16337, Ca 0.0282817, Mg 0.808349_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 1; `ORC-YGHB5EFX42` |  |
| Phase transition | 843.15 K | 843.15 | Sample 3 DSC cooling; _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 18; `ORC-BJYVBNQ6WS` |  |
| Phase transition | 873.15 K | 873.15 | L+Mg2Ca+(Mg)/Mg2Ca+(Mg)+Al2Ca; _alloy: Al 0.027261, Ca 0.162621, Mg 0.810118_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 21; `ORC-VSCGDXCLSJ` |  |
| Phase transition | 1015.15 K | 1015.15 | L/L+ Al2Ca; _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | model | [1] ISLAM 2005 | Table VII, p. 11, row 13; `ORC-RTLIPIJRGX` |  |
| Phase transition | 1033.15 K | 1033.15 | Sample 2 DSC cooling; _alloy: Al 0.335395, Ca 0.162075, Mg 0.502531_ | experimental | [1] ISLAM 2005; _cites ref. 42_ | Table VII, p. 11, row 8; `ORC-J77HEZ4FGE` |  |

## Sources

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

1. F. ISLAM, M. MEDRAJ, THERMODYNAMIC MODELLING OF THE Mg-Al-Ca SYSTEM, Canadian Metallurgical Quarterly 44, 523-536 (2005). [doi:10.1179/cmq.2005.44.4.523](https://doi.org/10.1179/cmq.2005.44.4.523)

## 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/).