Ca–Mg–Si system

63 accepted literature values from 1 paper(s) (experimental 38, model 25); 0 calculated phase diagram(s). 57 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

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Accepted values by evidence class
Evidence class	Values
experimental	38
model	25

Accepted values by property group
Property group	Values
invariant reaction	22
phase transition	9
phase equilibrium	18
crystal structure	13
other property	1

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ca–Mg–Si system (22)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1500.15	other: Liquid = CaSi + CaMgSi	L: Ca 0.4178, Mg 0.1848	model	[1] Gröbner 2003	Table 6, p. 8, row 1 report
1477.15	other: Liquid -> Ca2Si + CaMgSi	L: Ca 0.5222, Mg 0.1412	model	[1] Gröbner 2003	Table 6, p. 8, row 2 report
1476.95	quasi-peritectic: Liquid + CaSi -> CaMgSi + Ca5Si3	L: Ca 0.5248, Mg 0.1148	model	[1] Gröbner 2003	Table 6, p. 8, row 3 report
1476.85	eutectic: Liquid -> Ca2Si + CaMgSi + Ca5Si3	L: Ca 0.5259, Mg 0.121	model	[1] Gröbner 2003	Table 6, p. 8, row 4 report
1423.45	other: Liquid -> CaSi + Ca7Mg6Si14	L: Ca 0.2539, Mg 0.2301	model	[1] Gröbner 2003	Table 6, p. 8, row 5 report
1423.15	quasi-peritectic: Liquid + CaSi -> CaMgSi + Ca7Mg6Si14	L: Ca 0.2459, Mg 0.2522	model	[1] Gröbner 2003	Table 6, p. 8, row 7 report
1423.15	quasi-peritectic: Liquid + CaSi -> CaMgSi + Ca7Mg6Si14		experimental	[1] Gröbner 2003	Table 6, p. 8, row 6 report
1349.15	quasi-peritectic: Liquid + CaSi -> Ca14Si19 + Ca7Mg6Si14	L: Ca 0.2821, Mg 0.0297	model	[1] Gröbner 2003	Table 6, p. 8, row 8 report
1330.15	other: Liquid -> Ca7Mg6Si14 + Mg2Si	L: Ca 0.0401, Mg 0.5926	model	[1] Gröbner 2003	Table 6, p. 8, row 9 report
1328.15	other: Liquid -> Ca7Mg6Si14 + (Si)	L: Ca 0.155, Mg 0.1318	model	[1] Gröbner 2003	Table 6, p. 8, row 10 report
1327.15	quasi-peritectic: Liquid + Ca7Mg6Si14 -> CaMgSi + Mg2Si	L: Ca 0.0441, Mg 0.6289	model	[1] Gröbner 2003	Table 6, p. 8, row 11 report
1298.15	quasi-peritectic: Liquid + Ca14Si19 -> CaSi2 + Ca7Mg6Si14	L: Ca 0.2458, Mg 0.0179	model	[1] Gröbner 2003	Table 6, p. 8, row 12 report
1293.15	eutectic: Liquid -> CaSi2 + Ca7Mg6Si14 + (Si)	L: Ca 0.2384, Mg 0.0184	model	[1] Gröbner 2003	Table 6, p. 8, row 13 report
1221.15	eutectic: Liquid -> Mg2Si + Ca7Mg6Si14 + (Si)		experimental	[1] Gröbner 2003	Table 6, p. 8, row 14 report
1216.15	eutectic: Liquid -> Mg2Si + Ca7Mg6Si14 + (Si)	L: Ca 0.0073, Mg 0.449	model	[1] Gröbner 2003	Table 6, p. 8, row 15 report
983.15	other: Liquid -> CaMgSi + CaMg2	L: Ca 0.3313, Mg 0.6683	model	[1] Gröbner 2003	Table 6, p. 8, row 16 report
982.15	quasi-peritectic: Liquid + CaMgSi -> Ca2Si + CaMg2		experimental	[1] Gröbner 2003	Table 6, p. 8, row 17 report
982.15	quasi-peritectic: Liquid + CaMgSi -> Ca2Si + CaMg2	L: Ca 0.3482, Mg 0.6514	model	[1] Gröbner 2003	Table 6, p. 8, row 18 report
918.15	other: Liquid -> CaMgSi + (Mg)	L: Ca 0.0022, Mg 0.9944	model	[1] Gröbner 2003	Table 6, p. 8, row 19 report
910.15	eutectic: Liquid -> CaMgSi + Mg2Si + (Mg)	L: Ca 4.000e-4, Mg 0.9851	model	[1] Gröbner 2003	Table 6, p. 8, row 20 report
789.15	quasi-peritectic: Liquid + CaMgSi -> CaMg2 + (Mg)	L: Ca 0.1058, Mg 0.8942	model	[1] Gröbner 2003	Table 6, p. 8, row 21 report
719.15	quasi-peritectic: Liquid + Ca2Si -> CaMg2 + β(Ca)	L: Ca 0.7078, Mg 0.2921	model	[1] Gröbner 2003	Table 6, p. 8, row 22 report

Other properties

Phase transition (9)

Phase transition, Ca–Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1413.15 K	1413.15	L/L + CaSi alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 5, p. 6, row 7 report
Phase transition	1424.15 K	1424.15	L/L + CaSi alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 5, p. 6, row 10 report
Phase transition	1446.15 K	1446.15	L/L + CaSi alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 5, p. 6, row 6 report
Phase transition	1447.15 K	1447.15	L/L + Ca2Si alloy: Ca 0.34, Mg 0.5, Si 0.16	experimental	[1] Gröbner 2003	Table 5, p. 6, row 57 report
Phase transition	1447.45 K	1447.45	L/L + Ca2Si alloy: Ca 0.34, Mg 0.5, Si 0.16	experimental	[1] Gröbner 2003	Table 5, p. 6, row 56 report
Phase transition	1448.15 K	1448.15	L/L + CaSi alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 5, p. 6, row 8 report
Phase transition	1451.15 K	1451.15	L/L + CaSi alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 5, p. 6, row 9 report
Phase transition	1454.75 K	1454.75	L/L + Ca2Si alloy: Ca 0.34, Mg 0.5, Si 0.16	experimental	[1] Gröbner 2003	Table 5, p. 6, row 55 report
Phase transition	1467.45 K	1467.45	L/L + Ca2Si alloy: Ca 0.34, Mg 0.5, Si 0.16	experimental	[1] Gröbner 2003	Table 5, p. 6, row 58 report

Phase equilibrium (18)

Phase equilibrium, Ca–Mg–Si system
Property	T (K)	Phases / composition	Class	Source	Location
Phase assemblage	673.15	(Ca) + CaMg2 + Ca2Si alloy: Ca 0.6, Mg 0.3, Si 0.1	experimental	[1] Gröbner 2003	Table 3, p. 5, row 17 report
Phase assemblage	673.15	(Mg) + Mg2Si + CaMgSi alloy: Ca 0.2, Mg 0.6, Si 0.2	experimental	[1] Gröbner 2003	Table 3, p. 5, row 14 report
Phase assemblage	673.15	Ca2Si + CaMg2 + (Ca) alloy: Ca 0.25, Mg 0.1, Si 0.65	experimental	[1] Gröbner 2003	Table 3, p. 5, row 13 report
Phase assemblage	673.15	Ca5Si3 + Ca2Si + CaMgSi + Ca1.21Mg0.79Si alloy: Ca 0.35, Mg 0.1, Si 0.55	experimental	[1] Gröbner 2003	Table 3, p. 5, row 7 report
Phase assemblage	673.15	Ca5Si3 + CaSi + CaMgSi alloy: Ca 0.5, Mg 0.17, Si 0.33	experimental	[1] Gröbner 2003	Table 3, p. 5, row 11 report
Phase assemblage	673.15	Ca5Si3 + CaSi + CaMgSi alloy: Ca 0.57, Mg 0.1, Si 0.33	experimental	[1] Gröbner 2003	Table 3, p. 5, row 12 report
Phase assemblage	673.15	Ca7Mg6Si14 + Si alloy: Ca 0.25, Mg 0.21, Si 0.54	experimental	[1] Gröbner 2003	Table 3, p. 5, row 3 report
Phase assemblage	673.15	CaMg2 + (Mg) + CaMgSi alloy: Ca 0.25, Mg 0.7, Si 0.05	experimental	[1] Gröbner 2003	Table 3, p. 5, row 18 report
Phase assemblage	673.15	CaMg2 + Ca2Si + CaMgSi alloy: Ca 0.34, Mg 0.5, Si 0.16	experimental	[1] Gröbner 2003	Table 3, p. 5, row 15 report
Phase assemblage	673.15	CaMg2 + Mg + CaMgSi alloy: Ca 0.1, Mg 0.8, Si 0.1	experimental	[1] Gröbner 2003	Table 3, p. 5, row 16 report
Phase assemblage	673.15	CaMgSi + CaMg2 + Ca7Mg6Si14 alloy: Ca 0.33, Mg 0.33, Si 0.33	experimental	[1] Gröbner 2003	Table 3, p. 5, row 9 report
Phase assemblage	673.15	CaSi + Ca7Mg6Si14 alloy: Ca 0.34, Mg 0.16, Si 0.5	experimental	[1] Gröbner 2003	Table 3, p. 5, row 4 report
Phase assemblage	673.15	CaSi + CaMgSi alloy: Ca 0.42, Mg 0.25, Si 0.33	experimental	[1] Gröbner 2003	Table 3, p. 5, row 10 report
Phase assemblage	673.15	CaSi + CaMgSi + Ca1.21Mg0.79Si alloy: Ca 0.45, Mg 0.1, Si 0.45	experimental	[1] Gröbner 2003	Table 3, p. 5, row 5 report
Phase assemblage	673.15	CaSi + CaMgSi + Ca7Mg6Si14 alloy: Ca 0.4, Mg 0.2, Si 0.4	experimental	[1] Gröbner 2003	Table 3, p. 5, row 6 report
Phase assemblage	673.15	CaSi2 + Ca7Mg6Si14 + Ca3Si4 + CaSi alloy: Ca 0.35, Mg 0.1, Si 0.55	experimental	[1] Gröbner 2003	Table 3, p. 5, row 2 report
Phase assemblage	673.15	CaSi2 + Ca7Mg6Si14 + Si + Ca3Si4 alloy: Ca 0.25, Mg 0.1, Si 0.65	experimental	[1] Gröbner 2003	Table 3, p. 5, row 1 report
Phase assemblage	673.15	Mg2Si + CaMgSi + Ca7Mg6Si14 alloy: Ca 0.19, Mg 0.48, Si 0.33	experimental	[1] Gröbner 2003	Table 3, p. 5, row 8 report

Crystal structure (13)

Crystal structure, Ca–Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	1270.8 not_printed ± 0.5	1423.15 (<)	τ2, Ca7Mg6Si14 alloy: Mg 0.222222, Si 0.518519	experimental	[1] Gröbner 2003	Table 4, p. 5, row 5 report
Lattice a	12.71 Å	1423.15 (<)	τ2, Ca7Mg6Si14 alloy: Mg 0.222222, Si 0.518519	model	[1] Gröbner 2003 cites Zmiy 1974	Table 4, p. 5, row 4 report
Lattice a	748.1 not_printed	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.333	experimental	[1] Gröbner 2003	Table 4, p. 5, row 2 report
Lattice a	750.4 not_printed ± 0.5	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.263	experimental	[1] Gröbner 2003	Table 4, p. 5, row 3 report
Lattice a	7.48 Å	1507.15 (<)	τ1	model	[1] Gröbner 2003 cites Eisenman 1972	Table 4, p. 5, row 1 report
Lattice b	445.2 not_printed ± 0.6	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.333	experimental	[1] Gröbner 2003	Table 4, p. 5, row 2 report
Lattice b	445.2 not_printed ± 0.4	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.263	experimental	[1] Gröbner 2003	Table 4, p. 5, row 3 report
Lattice b	4.4 Å	1507.15 (<)	τ1	model	[1] Gröbner 2003 cites Eisenman 1972	Table 4, p. 5, row 1 report
Lattice c	438.8 not_printed ± 0.3	1423.15 (<)	τ2, Ca7Mg6Si14 alloy: Mg 0.222222, Si 0.518519	experimental	[1] Gröbner 2003	Table 4, p. 5, row 5 report
Lattice c	4.37 Å	1423.15 (<)	τ2, Ca7Mg6Si14 alloy: Mg 0.222222, Si 0.518519	model	[1] Gröbner 2003 cites Zmiy 1974	Table 4, p. 5, row 4 report
Lattice c	829.7 not_printed ± 0.8	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.333	experimental	[1] Gröbner 2003	Table 4, p. 5, row 2 report
Lattice c	837.1 not_printed ± 0.7	1507.15 (<)	τ1 τ1, Ca1+δMg1-δSi CaMgSi: Mg 0.263	experimental	[1] Gröbner 2003	Table 4, p. 5, row 3 report
Lattice c	8.29 Å	1507.15 (<)	τ1	model	[1] Gröbner 2003 cites Eisenman 1972	Table 4, p. 5, row 1 report

Other property (1)

Other property, Ca–Mg–Si system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Other printed: fH	305 kJ/kg	1138.15		model	[1] Gröbner 2003	p. 4 report	A heat of fusion, fH=305 kJ/kg at 865 C was reported by [27], however for an alloy composition Ca15Mg35Si50 (at.%), which has a much lower Cacontent compared to Ca7Mg6Si14.

Sources

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

Joachim Gröbner, Igor Chumak, Rainer Schmid-Fetzer, Experimental study of ternary Ca–Mg–Si phase equilibria and thermodynamic assessment of Ca–Si and Ca–Mg–Si systems, Intermetallics 11, 1065-1074 (2003). doi:10.1016/j.intermet.2003.07.001

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). doi: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). doi: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.

@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}
}