# Ca–Ce–Mg system

> Ca–Ce–Mg system: 56 accepted literature values (phase transition 24, invariant reaction 24, phase equilibrium 8) and 0 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/CA-CE-MG.html · Markdown: https://data.orchid-project.org/systems/CA-CE-MG.md

56 accepted literature values from 2 paper(s) (experimental 34, model 22); 0 calculated phase diagram(s). 17 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/CA-CE-MG.json) · [CSV](https://data.orchid-project.org/systems/CA-CE-MG.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CA-CE-MG) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CA-CE-MG.html) · [Markdown](https://data.orchid-project.org/systems/CA-CE-MG.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 34 |
| model | 22 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 24 |
| phase transition | 24 |
| phase equilibrium | 8 |

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Ca–Ce–Mg system (24)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1048.15 | quasi-peritectic: L'' + βCa = L' + βCe |  | model | [1] Hampl 2007 | Table 4, p. 5, row 1; `ORC-6DEQP7LRPT` |  |
| 945.15 | other: L' = CaMg2 + CeMg3 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 2; `ORC-DJ3Q436VB6` |  |
| 943.15 | other: L' + L'' = CeMg |  | model | [1] Hampl 2007 | Table 4, p. 5, row 3; `ORC-UIG7I7OLLW` |  |
| 926.15 | eutectic: L'' = βCe + CeMg + L' |  | model | [1] Hampl 2007 | Table 4, p. 5, row 4; `ORC-LV5L3ZC55R` |  |
| 920.63 | Mg2Ce + liquid 2 -> Mg3Ce + liquid 1 | unspecified (invariant point): Ce 0.2687, Mg 0.692 | model | [2] Zhang 2008 | Table 7, p. 7, row 2; `ORC-OGI5GBKLGK` |  |
| 918.56 | MgCe + liquid 1 -> Mg2Ce + liquid 2 | unspecified (invariant point): Ce 0.3271, Mg 0.5744 | model | [2] Zhang 2008 | Table 7, p. 7, row 1; `ORC-NQ6NI56JYJ` |  |
| 888.15 | quasi-peritectic: L + CeMg2 = CeMg + CeMg3 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 5; `ORC-KMMUFBHNQJ` |  |
| 885.15 | quasi-peritectic: L + βCe = CeMg + βCa |  | model | [1] Hampl 2007 | Table 4, p. 5, row 6; `ORC-2AYLVYXR46` |  |
| 884.15 | quasi-peritectic: L + Ce2Mg17 = Ce5Mg41 + CeMg12 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 7; `ORC-VJT6NJ6TPJ` |  |
| 877.21 | Mg17Ce2 + liquid 1 -> Mg41Ce5 + Mg12Ce | unspecified (invariant point): Ce 0.1019, Mg 0.898 | model | [2] Zhang 2008 | Table 7, p. 7, row 6; `ORC-5HDEI5LFGE` |  |
| 868.81 | Mg3Ce + liquid 1 -> Mg2Ca + Mg41Ce5 | unspecified (invariant point): Ce 0.1122, Mg 0.8675 | model | [2] Zhang 2008 | Table 7, p. 7, row 3; `ORC-ZEICPBALP6` |  |
| 866.62 | Liquid 1 + liquid 2 + bcc(Ce) -> MgCe | unspecified (invariant point): Ce 0.3514, Mg 0.2882 | model | [2] Zhang 2008 | Table 7, p. 7, row 7; `ORC-YTR5ZNYTOV` |  |
| 864.15 | quasi-peritectic: L + CeMg3 = CaMg2 + Ce5Mg41 |  | experimental | [1] Hampl 2007 | Table 4, p. 5, row 9; `ORC-E3GOL45BHS` |  |
| 855.15 | quasi-peritectic: L + CeMg3 = CaMg2 + Ce5Mg41 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 8; `ORC-XMTMSIS6U6` |  |
| 820.29 | Mg41Ce5 + liquid 1 -> Mg12Ce + Mg2Ca | unspecified (invariant point): Ce 0.0954, Mg 0.8871 | model | [2] Zhang 2008 | Table 7, p. 7, row 4; `ORC-35D3ECNKXL` |  |
| 815.15 | quasi-peritectic: L + Ce5Mg41 = CaMg2 + CeMg12 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 10; `ORC-3FNMQ5UQH6` |  |
| 813.15 | quasi-peritectic: L + Ce5Mg41 = CaMg2 + CeMg12 |  | experimental | [1] Hampl 2007 | Table 4, p. 5, row 11; `ORC-PXNJ6TUDVQ` |  |
| 805.15 | quasi-peritectic: L + CeMg3 = CeMg + CaMg2 |  | model | [1] Hampl 2007 | Table 4, p. 5, row 12; `ORC-UOLXPCTQBC` |  |
| 790.3 | Liquid 1 -> Mg2Ca + Mg12Ce + hcp(Mg) | unspecified (invariant point): Ce 0.0557, Mg 0.883 | model | [2] Zhang 2008 | Table 7, p. 7, row 5; `ORC-SAOW5NLYVF` |  |
| 787.15 | eutectic: L = CeMg12 + CaMg2 + (Mg) |  | model | [1] Hampl 2007 | Table 4, p. 5, row 13; `ORC-TQ6QSECONQ` |  |
| 786.15 | eutectic: L = CeMg12 + CaMg2 + (Mg) |  | experimental | [1] Hampl 2007 | Table 4, p. 5, row 14; `ORC-LHACRDQMRE` |  |
| 766.21 | Liquid 1 + liquid 2 -> bcc(Ca) + Mg3Ce | unspecified (invariant point): Ce 0.2367, Mg 0.5139 | model | [2] Zhang 2008 | Table 7, p. 7, row 9; `ORC-RFYOZLI2RC` |  |
| 720.22 | Mg3Ce + liquid 2 -> bcc(Ca) + Mg2Ca | unspecified (invariant point): Ce 0.1113, Mg 0.5855 | model | [2] Zhang 2008 | Table 7, p. 7, row 8; `ORC-2VANEV2KFR` |  |
| 718.15 | eutectic: L = βCa + CaMg2 + CeMg |  | model | [1] Hampl 2007 | Table 4, p. 5, row 15; `ORC-SNYBMIAZFX` |  |

## Other properties

### Phase transition (24)

Table: Phase transition, Ca–Ce–Mg system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 732.15 K | 732.15 | polymorphic: βCa = αCa ((+αCe)) | experimental | [1] Hampl 2007 | Table 2, p. 4, row 24; `ORC-JSUW7MZOPN` |  |
| Phase transition | 785.15 K | 785.15 | eutectic: E2 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 5; `ORC-Q46LKJU67E` |  |
| Phase transition | 786.15 K | 786.15 | eutectic: E2 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 11; `ORC-TQ7B7JCU2Y` |  |
| Phase transition | 787.15 K | 787.15 | eutectic: E2 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 8; `ORC-A2HAF6OCYL` |  |
| Phase transition | 815.15 K | 815.15 | other: L + Ce5Mg41 = CaMg2 + CeMg12 | model | [1] Hampl 2007 | p. 7; `ORC-QTGLNYT2ZB` | “not differ until the tertiary step, where the reaction U6 at 542 °C is encountered. Under equilibrium conditions the entire amount of Ce5Mg41 (60%) should be completely consumed for this alloy in the transition-type reaction U6, L + Ce5Mg41 = CaMg2 + CeMg12.” |
| Phase transition | 823.15 K | 823.15 | L + CeMg12/L + CeMg12 + (Mg) | experimental | [1] Hampl 2007 | Table 2, p. 4, row 6; `ORC-XU6J4IQIK6` |  |
| Phase transition | 825.15 K | 825.15 | L + (Mg)/L + (Mg) + CeMg12 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 28; `ORC-QKS2LVCJ4Z` |  |
| Phase transition | 828.15 K | 828.15 | L + (Mg)/L + (Mg) + CeMg12 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 2; `ORC-HAXCNM5ELE` |  |
| Phase transition | 834.15 K | 834.15 | other: L/L + CeMg12 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 7; `ORC-FUFC3FHSNK` |  |
| Phase transition | 839.15 K | 839.15 | L + CeMg12/L + CeMg12 + (Mg) | experimental | [1] Hampl 2007 | Table 2, p. 4, row 30; `ORC-CK3JU5GM6M` |  |
| Phase transition | 842.15 K | 842.15 | L + CeMg12/L + CeMg12 + (Mg) | experimental | [1] Hampl 2007 | Table 2, p. 4, row 9; `ORC-ZTUU4ZKQUY` |  |
| Phase transition | 859.15 K | 859.15 | L/L + CeMg12 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 31; `ORC-IIUGZSO6C7` |  |
| Phase transition | 860.15 K | 860.15 | other: L/L + CeMg12 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 10; `ORC-X6UFEMQBMO` |  |
| Phase transition | 865.15 K | 865.15 | L/L + Ce5Mg41 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 33; `ORC-T2Z2W2GDRC` |  |
| Phase transition | 880.15 K | 880.15 | other: L/L + Ce5Mg41 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 13; `ORC-JC2X2AGZQS` |  |
| Phase transition | 884.15 K | 884.15 | other: L/L + (Mg) | experimental | [1] Hampl 2007 | Table 2, p. 4, row 3; `ORC-CTUR3JLUF4` |  |
| Phase transition | 913.15 K | 913.15 | other: L/L + CeMg3 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 17; `ORC-NKOAOTTURR` |  |
| Phase transition | 988.15 K | 988.15 | polymorphic: βCe = αCe + βCa | experimental | [1] Hampl 2007 | Table 2, p. 4, row 25; `ORC-X7D6QB7QMQ` |  |
| Phase transition | 1010.15 K | 1010.15 | other: L/L + CaMg2 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 21; `ORC-F4O5M23R6W` |  |
| Phase transition | 1013.15 K | 1013.15 | L/L + CaMg2 | experimental | [1] Hampl 2007 | Table 2, p. 4, row 37; `ORC-HW3IDQDLQQ` |  |
| Phase transition | 1042.15 K | 1042.15 | other: L/L + CeMg3? | experimental | [1] Hampl 2007 | Table 2, p. 4, row 23; `ORC-6QNK463FQO` |  |
| Phase transition | 1078.15 K | 1078.15 | L″ + βCa = βCe | experimental | [1] Hampl 2007 | Table 2, p. 4, row 26; `ORC-J4P66AHAWB` |  |
| Phase transition | 1121.15 K | 1121.15 | L′ + L″ = βCa | experimental | [1] Hampl 2007 | Table 2, p. 4, row 27; `ORC-7SMXH77XTM` |  |
| Phase transition | 1122.15 K | 1122.15 | L′ + L″ = βCa | experimental | [1] Hampl 2007 | Table 2, p. 4, row 42; `ORC-NI6EFEZ3AK` |  |

### Phase equilibrium (8)

Table: Phase equilibrium, Ca–Ce–Mg system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase assemblage |  |  | (Ca) + (Ce); _alloy: Ca 0.5, Ce 0.5, Mg 0_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 8; `ORC-TAZE2OMZTZ` |  |
| Phase assemblage |  |  | (Mg) + CeMg12; _alloy: Ca 0.023, Ce 0.01, Mg 0.967_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 1; `ORC-2ILQUXBOGS` |  |
| Phase assemblage |  |  | CaMg2 + CeMg12; _alloy: Ca 0.25, Ce 0.04, Mg 0.71_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 6; `ORC-S6NJWBZXUI` |  |
| Phase assemblage |  |  | Ce5Mg41 + CaMg2 + (Mg); _alloy: Ca 0.057, Ce 0.063, Mg 0.88_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 4; `ORC-SZAO6KNY6P` |  |
| Phase assemblage |  |  | CeMg12 + (Mg); _alloy: Ca 0.03, Ce 0.04, Mg 0.93_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 3; `ORC-6A2OL27CTV` |  |
| Phase assemblage |  |  | CeMg12 + (Mg); _alloy: Ca 0.04, Ce 0.03, Mg 0.93_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 2; `ORC-JQMAXZQHN4` |  |
| Phase assemblage |  |  | CeMg3 + Ce5Mg41 + CaMg2; _alloy: Ca 0.082, Ce 0.082, Mg 0.836_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 5; `ORC-7XQGFNRC6E` |  |
| Phase assemblage |  |  | CeMg3 + CeMg; _alloy: Ca 0.15, Ce 0.22, Mg 0.63_ | experimental | [1] Hampl 2007 | Table 1, p. 4, row 7; `ORC-IUF5BPNVHD` |  |

## Sources

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

1. Milan Hampl, Joachim Gröbner, Rainer Schmid-Fetzer, Experimental study of phase equilibria and solidification microstructures of Mg–Ca–Ce alloys combined with thermodynamic modeling, J Mater Sci 42, 10023-10031 (2007). [doi:10.1007/s10853-007-2002-2](https://doi.org/10.1007/s10853-007-2002-2)
2. Hui Zhang, Yi Wang, Shunli Shang, Long-Qing Chen, Zi-Kui Liu, Thermodynamic modeling of Mg–Ca–Ce system by combining first-principles and CALPHAD method, Journal of Alloys and Compounds 463, 294-301 (2008). [doi:10.1016/j.jallcom.2007.09.020](https://doi.org/10.1016/j.jallcom.2007.09.020)

## 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/).