Ca–Fe–O system

72 accepted literature values from 1 paper(s) (experimental 33, model 39); 0 calculated phase diagram(s).

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Accepted values by evidence class
Evidence class	Values
experimental	33
model	39

Accepted values by property group
Property group	Values
invariant reaction	61
phase transition	1
heat capacity / entropy / enthalpy	8
activity / EMF / Gibbs energy	2

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ca–Fe–O system (61)
T (K)	Reaction / phases	Class	Source	Location
1505	other: L + F + WF -> C4WF8	model	[1] Hillert 1990	Table IV, p. 12, row 49 report
1503	other: L + F + WF -> C4WF8	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 48 report
1493	other: L + F -> CF2 + C4WF8	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 46 report
1485	other: L -> WF + C2F + C4WF4	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 44 report
1484	other: L + F -> CF2 + C4WF8	model	[1] Hillert 1990	Table IV, p. 12, row 47 report
1483	other: L + C2F -> CF + C4WF4	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 42 report
1475	other: L -> WF + C2F + C4WF4	model	[1] Hillert 1990	Table IV, p. 12, row 45 report
1473	other: L + CF2 -> CF + C4WF8	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 40 report
1470	other: L + C4WF4 -> CF + WF	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 38 report
1470	other: L + C2F -> CF + C4WF4	model	[1] Hillert 1990	Table IV, p. 12, row 43 report
1467	other: L -> CF + WF + C4WF8	experimental	[1] Hillert 1990 cites Phillips 1960	Table IV, p. 12, row 36 report
1467	other: L + CF2 -> CF + C4WF8	model	[1] Hillert 1990	Table IV, p. 12, row 41 report
1463	other: L + WF + C2F -> CWF	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 34 report
1460	other: L + C4WF4 -> CF + WF	model	[1] Hillert 1990	Table IV, p. 12, row 39 report
1460	other: L -> CF + WF + C4WF8	model	[1] Hillert 1990	Table IV, p. 12, row 37 report
1455	other: L + WF + C2F -> CWF	model	[1] Hillert 1990	Table IV, p. 12, row 35 report
1451	other: CF2 -> CF + F (+ C4WF8)	model	[1] Hillert 1990	Table IV, p. 12, row 33 report
1440	other: C4WF8 -> F + WF + CF	model	[1] Hillert 1990	Table IV, p. 12, row 32 report
1423	other: WF + L -> CWF + W	model	[1] Hillert 1990	Table IV, p. 12, row 31 report
1423	other: WF + L -> CWF + W	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 30 report
1404	other: L + Fe + C -> W	model	[1] Hillert 1990	Table IV, p. 12, row 29 report
1400	eutectic: W + CWF + C2F -> CW3F	experimental	[1] Hillert 1990 cites Chung 1988	Table IV, p. 12, row 51 report
1396	eutectic: W + CWF + C2F -> CW3F	model	[1] Hillert 1990	Table IV, p. 12, row 53 report
1393	other: L + Fe + C -> W	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 28 report
1388	other: L + C -> W + C2F	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 26 report
1383	other: L + CWF -> C2F + W	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 60 report
1381	other: L + C -> W + C2F	model	[1] Hillert 1990	Table IV, p. 12, row 27 report
1380	other: L + W + CWF -> CW3F	model	[1] Hillert 1990	Table IV, p. 12, row 25 report
1374	other: L + CWF -> CW3F + C2F	model	[1] Hillert 1990	Table IV, p. 12, row 23 report
1373	other: L + CWF -> CW3F + C2F	experimental	[1] Hillert 1990 cites Bergman 1989 doi	Table IV, p. 12, row 22 report
1373	other: L + W + CWF -> CW3F	experimental	[1] Hillert 1990 cites Bergman 1989 doi	Table IV, p. 12, row 24 report
1373	other: L + CW3F -> C2F + W	experimental	[1] Hillert 1990 cites Bergman 1989 doi	Table IV, p. 12, row 20 report
1372	other: L + CWF -> C2F + W	model	[1] Hillert 1990	Table IV, p. 12, row 61 report
1371	other: L + CW3F -> C2F + W	model	[1] Hillert 1990	Table IV, p. 12, row 21 report
1355	other: WF + CF -> C4WF4 + F	model	[1] Hillert 1990	Table IV, p. 12, row 19 report
1343	quasi-peritectic: W + C -> C2F + Fe	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 17 report
1333	eutectic: W + CWF + C2F -> CW3F	experimental	[1] Hillert 1990 cites Schiirmann 1973	Table IV, p. 12, row 50 report
1333	quasi-peritectic: W + C -> C2F + Fe	experimental	[1] Hillert 1990 cites Bj 1984	Table IV, p. 12, row 16 report
1324	quasi-peritectic: W + C -> C2F + Fe	model	[1] Hillert 1990	Table IV, p. 12, row 18 report
1318	quasi-peritectic: W + C -> C2F + Fe	experimental	[1] Hillert 1990 cites Abbattista 1975	Table IV, p. 12, row 15 report
1308	eutectic: W + CWF + C2F -> CW3F	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 52 report
1307	other: WF + C2F -> CWF + C4WF4	model	[1] Hillert 1990	Table IV, p. 12, row 13 report
1300	quasi-peritectic: W + C -> C2F + Fe	experimental	[1] Hillert 1990 cites Chung 1988	Table IV, p. 12, row 14 report
1113	peritectic: W + C2F -> CW3F + Fe	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 11 report
1095	peritectic: W + C2F -> CW3F + Fe	model	[1] Hillert 1990	Table IV, p. 12, row 12 report
1088	peritectic: W + C2F -> CW3F + Fe	experimental	[1] Hillert 1990 cites Chung 1988	Table IV, p. 12, row 10 report
1019	other: W + CWF -> CW3F + WF	model	[1] Hillert 1990	Table IV, p. 12, row 9 report
953	other: C2F + CW3F -> CWF + Fe	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 7 report
935	other: C2F + CW3F -> CWF + Fe	experimental	[1] Hillert 1990 cites Chung 1988	Table IV, p. 12, row 6 report
925	other: C2F + CW3F -> CWF + Fe	model	[1] Hillert 1990	Table IV, p. 12, row 8 report
918	other: CW3F -> Fe + W + CWF	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 54 report
878	other: C2F + CWF -> C4WF4 + Fe	model	[1] Hillert 1990	Table IV, p. 12, row 5 report
855	other: CWF -> CW3F + C4WF4 (+ WF)	model	[1] Hillert 1990	Table IV, p. 12, row 3 report
855	other: CWF -> CW3F + C4WF4 (+ Fe)	model	[1] Hillert 1990	Table IV, p. 12, row 4 report
843	other: W -> Fe + WF + CWF	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 56 report
827	other: W -> Fe + WF + CW3F	model	[1] Hillert 1990	Table IV, p. 12, row 2 report
827	other: W -> Fe + WF + CWF	model	[1] Hillert 1990	Table IV, p. 12, row 57 report
826	other: CW3F -> Fe + WF + C4WF4	model	[1] Hillert 1990	Table IV, p. 12, row 1 report
787	other: CW3F -> Fe + W + CWF	model	[1] Hillert 1990	Table IV, p. 12, row 55 report
773	other: CWF -> Fe + WF + C2F	experimental	[1] Hillert 1990 cites Turkdogan 1961	Table IV, p. 12, row 58 report
688	other: CWF -> Fe + WF + C2F	model	[1] Hillert 1990	Table IV, p. 12, row 59 report

Other properties

Phase transition (1)

Phase transition, Ca–Fe–O system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1380 K	1380	CW3F + CWF + liquid	model	[1] Hillert 1990	p. 7 report	The present assessment comes close to the latter results and predicts that CW3F is stable up to 1380 K, where it decomposes to wiistite, CWF, and liquid.

Heat capacity / entropy / enthalpy (8)

Heat capacity / entropy / enthalpy, Ca–Fe–O system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: S (298.15)	188.7 J/mol (basis unstated)/K	298.15	C2F	experimental	[1] Hillert 1990 cites King 1954 doi	Table I, p. 5, row 4 report
Entropy printed: S (298.15)	189.4 J/mol (basis unstated)/K	298.15	C2F	model	[1] Hillert 1990	Table I, p. 5, row 3 report
Entropy printed: S (298.15)	145.2 J/mol (basis unstated)/K	298.15	CF	experimental	[1] Hillert 1990 cites King 1954 doi	Table I, p. 5, row 2 report
Entropy printed: S (298.15)	145.9 J/mol (basis unstated)/K	298.15	CF	model	[1] Hillert 1990	Table I, p. 5, row 1 report
Heat capacity printed: Cp (298.15)	192.9 J/mol (basis unstated)/K	298.15	C2F	experimental	[1] Hillert 1990 cites King 1954 doi	Table I, p. 5, row 4 report
Heat capacity printed: Cp (298.15)	197 J/mol (basis unstated)/K	298.15	C2F	model	[1] Hillert 1990	Table I, p. 5, row 3 report
Heat capacity printed: Cp (298.15)	153.6 J/mol (basis unstated)/K	298.15	CF	experimental	[1] Hillert 1990 cites King 1954 doi	Table I, p. 5, row 2 report
Heat capacity printed: Cp (298.15)	155.3 J/mol (basis unstated)/K	298.15	CF	model	[1] Hillert 1990	Table I, p. 5, row 1 report

Activity / EMF / Gibbs energy (2)

Activity / EMF / Gibbs energy, Ca–Fe–O system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Chemical potential printed: oxygen potential	-112.5 kcal/mole O2	563.15	CWF + Fe + WF + C2F	model	[1] Hillert 1990	p. 9 report	Reeve and Gregory12sl gave a more careful consideration of the position of the univariant line X and predicted that it would intersect the other lines to form the invariant equilibrium VII at 290 ~ and -112.5 kcal/ mole 02.
Chemical potential printed: oxygen potential	-105.6 kcal/mole O2	688.15	WF	model	[1] Hillert 1990	p. 9 report	If we extend the X line below point XIX, we find that the present assessment predicts that the metastable equilibrium VII should occur at 415 ~ and -105.6 kcal/mole 02.

Sources

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

Mats Hillert, Malin Selleby, Bo Sundman, An assessment of the Ca-Fe-O system, Metall Trans A 21, 2759-2776 (1990). doi:10.1007/bf02646071

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}
}