# Ca–Mg–Sr system > Ca–Mg–Sr system: 7 accepted literature values (invariant reaction 4, crystal structure 2, formation 1) 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-MG-SR.html · Markdown: https://data.orchid-project.org/systems/CA-MG-SR.md 7 accepted literature values from 1 paper(s) (model 4, unspecified 3); 0 calculated phase diagram(s). Data: [JSON](https://data.orchid-project.org/literature/systems/CA-MG-SR.json) · [CSV](https://data.orchid-project.org/systems/CA-MG-SR.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#CA-MG-SR) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/CA-MG-SR.html) · [Markdown](https://data.orchid-project.org/systems/CA-MG-SR.md) Table: Accepted values by evidence class | Evidence class | Values | |---|---:| | model | 4 | | unspecified | 3 | Table: Accepted values by property group | Property group | Values | |---|---:| | invariant reaction | 4 | | formation | 1 | | crystal structure | 2 | ## Invariant reactions (literature) Table: Invariant reactions reported in the literature for the Ca–Mg–Sr system (4) | T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote | |---:|---|---|---|---|---|---| | 859.5 | L + Mg23Sr6 = C14 + Mg38Sr9 | L: Ca 0.0195, Sr 0.161 | model | [1] Zhong 2006 | Table 5, p. 6, row 1; `ORC-FARFJCLI2V` | | | 841.9 | L + Mg38Sr9 = C14 + Mg17Sr2 | L: Ca 0.036, Sr 0.1308 | model | [1] Zhong 2006 | Table 5, p. 6, row 2; `ORC-AP6QBQXIZA` | | | 783.9 | L = C14 + Mg17Sr2 + hcp | L: Ca 0.0843, Sr 0.0275 | model | [1] Zhong 2006 | Table 5, p. 6, row 3; `ORC-NNWXKQ6A3Z` | | | 717 | L = C14 + fcc + bcc | L: Ca 0.6923, Sr 0.0153 | model | [1] Zhong 2006 | Table 5, p. 6, row 4; `ORC-D2PKLLQML5` | | ## 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, Ca–Mg–Sr system (1) | Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote | |---|---|---:|---:|---|---:|---:|---|---|---| | Ca2Ca-C14 | | 8.1768 kJ/mol-atom | 0 | unspecified | | | [1] Zhong 2006 | Table 2, p. 4, row 17; `ORC-LC4IA5W53Y.07bd23` | | ## Other properties ### Crystal structure (2) Table: Crystal structure, Ca–Mg–Sr system | Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote | |---|---:|---:|---|---|---|---|---| | Lattice a; _printed: a (=b)_ | 7.141 Å | 0 | Ca2Ca-C14; _alloy: Mg 0, Sr 0_ | unspecified | [1] Zhong 2006 | Table 2, p. 4, row 17; `ORC-NB2GTHKNSF.a1f0b8` | | | Lattice c; _printed: c_ | 11.699 Å | 0 | Ca2Ca-C14; _alloy: Mg 0, Sr 0_ | unspecified | [1] Zhong 2006 | Table 2, p. 4, row 17; `ORC-NB2GTHKNSF.3d858f` | | ## Sources Reporting papers the values were read from (a value cited from another work names that work in its row). 1. Yu Zhong, Jorge O. Sofo, Alan A. Luo, Zi-Kui Liu, Thermodynamics modeling of the Mg–Sr and Ca–Mg–Sr systems, Journal of Alloys and Compounds 421, 172-178 (2006). [doi:10.1016/j.jallcom.2005.09.076](https://doi.org/10.1016/j.jallcom.2005.09.076) ## 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=\, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).