C–Ce system

18 accepted literature values from 1 paper(s) (experimental 16, model 2); 0 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · phases (10) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	16
model	2

Accepted values by property group
Property group	Values
invariant reaction	4
formation	9
crystal structure	5

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the C–Ce system (4)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1373.15	βCeC2 + (C) <-> αCeC2		experimental	[1] Peng 2011 cites Winchell 1967 doi	Table 4, p. 6, row 20 report
1373.15	βCeC2 <-> Ce2C3 + αCeC2		experimental	[1] Peng 2011 cites Winchell 1967 doi	Table 4, p. 6, row 22 report
1372.95	βCeC2 <-> Ce2C3 + αCeC2	βCeC2: C 0.667; Ce2C3: C 0.6; αCeC2: C 0.667	model	[1] Peng 2011	Table 4, p. 6, row 21 report
1372.95	βCeC2 + (C) <-> αCeC2	βCeC2: C 0.667; (C): C 1; αCeC2: C 0.667	model	[1] Peng 2011	Table 4, p. 6, row 19 report

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.

Enthalpies of formation, C–Ce system (9)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
Ce2C3	Ce2C3	-35.3 kJ/mol-atom ± 1.1	298.15	experimental	-24.666 (mp-aaaabdwf)	-11.083 (oqmd-13369)	[1] Peng 2011 cites Baker 1971 doi	Table 2, p. 2, row 8 report
CeC2	CeC2	-40.03 kJ/mol-atom ± 3.7	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Vidhya 2003 doi	Table 2, p. 2, row 16 report
CeC2	CeC2	-34.9 kJ/mol-atom	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Faircloth 1968 doi	Table 2, p. 2, row 15 report
CeC2	CeC2	-32.4 kJ/mol-atom ± 1.8	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Baker 1971 doi	Table 2, p. 2, row 14 report
CeC2	CeC2	-31.3 kJ/mol-atom	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Pialoux 1988 doi	Table 2, p. 2, row 13 report
CeC2	CeC2	-29.5 kJ/mol-atom ± 3.5	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Anderson 2011	Table 2, p. 2, row 12 report
CeC2	CeC2	-27.2 kJ/mol-atom	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Winchell 1967 doi	Table 2, p. 2, row 10 report
CeC2	CeC2	-25.4 kJ/mol-atom ± 1.4	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Meschel 1995 doi	Table 2, p. 2, row 11 report
CeC2	CeC2	-20.9 kJ/mol-atom ± 7	298.15	experimental	-15.378 (mp-aaaaaeff)	-8.01 (oqmd-13373)	[1] Peng 2011 cites Balducci 1969	Table 2, p. 2, row 9 report

Other properties

Crystal structure (5)

Crystal structure, C–Ce system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	5.93 Å		β CeC2 alloy: Ce 0.333333	experimental	[1] Peng 2011 cites Winchell 1967 doi	Table 1, p. 2, row 11 report
Lattice a	8.44 Å	298.15	Ce2C3 alloy: Ce 0.4	experimental	[1] Peng 2011 cites Atoji 1961	Table 1, p. 2, row 9 report
Lattice a	3.88 Å	298.15	α CeC2 alloy: Ce 0.333333	experimental	[1] Peng 2011 cites Jones 1986 doi	Table 1, p. 2, row 10 report
Lattice c	5.2 Å		β CeC2 alloy: Ce 0.333333	experimental	[1] Peng 2011 cites Winchell 1967 doi	Table 1, p. 2, row 11 report
Lattice c	6.48 Å	298.15	α CeC2 alloy: Ce 0.333333	experimental	[1] Peng 2011 cites Jones 1986 doi	Table 1, p. 2, row 10 report

Sources

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

Yingbiao Peng, Yong Du, Lijun Zhang, Chunsheng Sha, Shuhong Liu, Feng Zheng et al., Thermodynamic modeling of the C–RE (RE=La, Ce and Pr) systems, Calphad 35, 533-541 (2011). doi:10.1016/j.calphad.2011.09.002

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-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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); 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); 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. 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_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}