Co–Ga system

44 accepted literature values from 3 paper(s) (experimental 22, model 12, DFT 10); 3 calculated phase diagram(s). 11 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (7) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	22
model	12
DFT	10

Accepted values by property group
Property group	Values
invariant reaction	21
formation	14
crystal structure	9

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
CoGa-05Su.tdb	X. Su, J.-C. Tedenac, Intermetallics, 13, 467-73(2005). doi:10.1016/j.intermet.2004.08.003	`d465d6a3ab86a311c1e29ed1293abad3aa84aaa7b773769bd930a288797c0fd7`	viewer · TDB · JSON
CoGa-10Cha.tdb	A. Chari, A. Garay, R. Arroyave, Calphad, 34, 189-95(2010). doi:10.1016/j.calphad.2010.02.004	`d36d75154ff187ec987f3f033ec9963eff169dd02215bce8311737df0203f8fd`	viewer · TDB · JSON
CoGa-99Gro.tdb	J. Groebner, R. Wenzel, G.G. Fischer, R. Schmid-Fetzer, J. Phase Equilib., 20, 615-25(1999). doi:10.1361/105497199770340608	`119f21425d794516e905b9a5bb5776acbb666cf212e82904caa365f6b4852379`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CoGa-05Su.tdb	1483.15	FCC_A1 (x(Ga) 0.18971) + COGA_B2 (x(Ga) 0.27047) + LIQUID (x(Ga) 0.31358)
CoGa-05Su.tdb	1127.69	COGA_B2 (x(Ga) 0.6104) + COGA3 (x(Ga) 0.75) + LIQUID (x(Ga) 0.83572)
CoGa-05Su.tdb	1127.69	COGA_B2 (x(Ga) 0.61045) + COGA3 (x(Ga) 0.75) + LIQUID (x(Ga) 0.83588)
CoGa-05Su.tdb	302.91	COGA3 (x(Ga) 0.75) + ORTHORHOMBIC_A11 (x(Ga) 1) + LIQUID (x(Ga) 1)
CoGa-10Cha.tdb	1119.92	COGA_B2 (x(Ga) 0.61858) + COGA3 (x(Ga) 0.75) + LIQUID (x(Ga) 0.83973)
CoGa-99Gro.tdb	1481.96	FCC_A1 (x(Ga) 0.14655) + LIQUID (x(Ga) 0.36925) + COGA_B2 (x(Ga) 0.37178)
CoGa-99Gro.tdb	1132.33	COGA_B2 (x(Ga) 0.61359) + COGA3 (x(Ga) 0.75) + LIQUID (x(Ga) 0.79882)
CoGa-99Gro.tdb	489.74	HCP_A3 (x(Ga) 0.10463) + FCC_A1 (x(Ga) 0.11141) + COGA_B2 (x(Ga) 0.43738)
CoGa-99Gro.tdb	302.91	COGA3 (x(Ga) 0.75) + ORTHORHOMBIC_A11 (x(Ga) 1) + LIQUID (x(Ga) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CoGa-05Su · CALPHAD hull CoGa-99Gro

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–Ga system (21)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1483	Liq. + fcc ↔ β	Liq.: Ga 0.265; fcc: Ga 0.19; β: Ga 0.265	experimental	[1] Chari 2010 cites Feschotte 1979	Table 4, p. 6, row 3 report
1483	Liq. + fcc ↔ β	Liq.: Ga 0.3136; fcc: Ga 0.1897; β: Ga 0.2705	model	[1] Chari 2010 cites Su 2005	Table 4, p. 6, row 2 report
1483	Liq. + (αCo) -> β	Liq.: Ga 0.265; (αCo): Ga 0.19; β: Ga 0.265	experimental	[2] Su 2005 cites ref. 79Fes	Table 2, p. 4, row 2 report
1483	Liq. + (αCo) -> β	Liq.: Ga 0.3136; (αCo): Ga 0.1897; β: Ga 0.2705	model	[2] Su 2005	Table 2, p. 4, row 1 report
1482	Liq. + fcc ↔ β	Liq.: Ga 0.3185; fcc: Ga 0.1966; β: Ga 0.2952	model	[1] Chari 2010	Table 4, p. 6, row 1 report
1480	Liq. + fcc ↔ β	Liq.: Ga 0.3; fcc: Ga 0.13; β: Ga 0.275	experimental	[1] Chari 2010 cites Esslinger 1957	Table 4, p. 6, row 4 report
1480	Liq. + (αCo) -> β	Liq.: Ga 0.3; (αCo): Ga 0.13; β: Ga 0.275	experimental	[2] Su 2005 cites ref. 57Ess	Table 2, p. 4, row 3 report
1450	Liq. + (αCo) -> β	Liq.: Ga 0.51; (αCo): Ga 0.33; β: Ga 0.36	experimental	[2] Su 2005 cites ref. 80Lu	Table 2, p. 4, row 4 report
1450	Liq. + fcc ↔ β	Liq.: Ga 0.51; fcc: Ga 0.33; β: Ga 0.36	experimental	[1] Chari 2010 cites Lu 1980	Table 4, p. 6, row 5 report
1128	Liq. + β -> CoGa3	Liq.: Ga 0.8; β: Ga 0.645; CoGa3: Co 0.25, Ga 0.75	experimental	[2] Su 2005 cites ref. 79Fes	Table 2, p. 4, row 6 report
1128	Liq. + β ↔ fcc	Liq.: Ga 0.8; β: Ga 0.645	experimental	[1] Chari 2010 cites Feschotte 1979	Table 4, p. 6, row 8 report
1128	Liq. + β ↔ fcc	Liq.: Ga 0.8355; β: Ga 0.6103	model	[1] Chari 2010 cites Su 2005	Table 4, p. 6, row 7 report
1128	Liq. + β -> CoGa3	Liq.: Ga 0.8355; β: Ga 0.6103; CoGa3: Co 0.25, Ga 0.75	model	[2] Su 2005	Table 2, p. 4, row 5 report
1120	peritectic: Liq + β → CoGa3		model	[1] Chari 2010	p. 3 report	In this study, CoGa3 is taken as a stoichiometric compound with the crystal structure tP16 which decomposes in the peritectic reaction Liq + β → CoGa3 . The temperature at which this reaction takes place is taken as 1120 K.
1120	Liq. + β ↔ fcc	Liq.: Ga 0.8397; β: Ga 0.6186	model	[1] Chari 2010	Table 4, p. 6, row 6 report
1111	Liq. + β ↔ fcc	Liq.: Ga 0.8; β: Ga 0.65	experimental	[1] Chari 2010 cites Esslinger 1957	Table 4, p. 6, row 9 report
1111	Liq. + β -> CoGa3	Liq.: Ga 0.8; β: Ga 0.65; CoGa3: Co 0.25, Ga 0.75	experimental	[2] Su 2005 cites ref. 57Ess	Table 2, p. 4, row 7 report
1106	Liq. + β ↔ fcc	Liq.: Ga 0.85; β: Ga 0.63	experimental	[1] Chari 2010 cites Lu 1980	Table 4, p. 6, row 10 report
1106	Liq. + β -> CoGa3	Liq.: Ga 0.85; β: Ga 0.63; CoGa3: Co 0.25, Ga 0.75	experimental	[2] Su 2005 cites ref. 82Lu	Table 2, p. 4, row 8 report
303.5	Liq. + CoGa3 → Orthorhombic Ga	Liq.: Ga 1; CoGa3: Ga 0.75; Orthorhombic Ga: Ga 1	experimental	[1] Chari 2010 cites Feschotte 1979	Table 4, p. 6, row 12 report
302.9	Liq. + CoGa3 → Orthorhombic Ga	Liq.: Ga 1; CoGa3: Ga 0.75; Orthorhombic Ga: Ga 1	model	[1] Chari 2010	Table 4, p. 6, row 11 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, Co–Ga system (14)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location
CoGa	CoGa	-41 kJ/mol-atom	298.15	experimental	-27.209 (mp-aaaaabrd)	-27.73 (oqmd-88346)	[3] Gröbner 1999 cites Predel 1975 doi	Table 1, p. 2, row 20 report
CoGa	CoGa	-38 kJ/mol-atom	1173	experimental	-27.209 (mp-aaaaabrd)	-27.73 (oqmd-88346)	[3] Gröbner 1999 cites Mikula 1987	Table 1, p. 2, row 24 report
CoGa	CoGa	-36 kJ/mol-atom	1173	experimental	-27.209 (mp-aaaaabrd)	-27.73 (oqmd-88346)	[3] Gröbner 1999 cites Katayama 1975 doi	Table 1, p. 2, row 23 report
CoGa	CoGa	-35.5 kJ/mol-atom	298.15	model	-27.209 (mp-aaaaabrd)	-27.73 (oqmd-88346)	[3] Gröbner 1999	Table 1, p. 2, row 21 report
CoGa	CoGa	-32 kJ/mol-atom	1100	experimental	-27.209 (mp-aaaaabrd)	-27.73 (oqmd-88346)	[3] Gröbner 1999 cites Th 1982	Table 1, p. 2, row 22 report
CoGa3	CoGa3	-45 kJ/mol-atom	298.15	experimental	-25.895 (mp-aaaabekt)	-25.771 (oqmd-29254)	[3] Gröbner 1999 cites Predel 1975 doi	Table 1, p. 2, row 25 report
CoGa3		-32.4 kJ/mol-atom	298.15	DFT			[1] Chari 2010	Table 2, p. 4, row 8 report
CoGa3	CoGa3	-29 kJ/mol-atom	298.15	model	-25.895 (mp-aaaabekt)	-25.771 (oqmd-29254)	[3] Gröbner 1999	Table 1, p. 2, row 26 report
CoGa3	CoGa3	-29 kJ/mol-atom	1100	experimental	-25.895 (mp-aaaabekt)	-25.771 (oqmd-29254)	[3] Gröbner 1999 cites Th 1982	Table 1, p. 2, row 27 report
CoGa3	CoGa3	-28.666 kJ/mol-atom	298.15	model	-25.895 (mp-aaaabekt)	-25.771 (oqmd-29254)	[1] Chari 2010	Table 2, p. 4, row 9 report
CoGa3		-25.9 kJ/mol-atom	298.15	DFT			[1] Chari 2010	Table 2, p. 4, row 7 report
β (Ga:Co)		-39.4 kJ/mol-atom	298.15	DFT			[1] Chari 2010	Table 2, p. 4, row 2 report
β (Ga:Co)		-37.833 kJ/mol-atom	298.15	model			[1] Chari 2010	Table 2, p. 4, row 3 report
β (Ga:Co)		-26.9 kJ/mol-atom	298.15	DFT			[1] Chari 2010	Table 2, p. 4, row 1 report

Other properties

Crystal structure (9)

Crystal structure, Co–Ga system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	6.242 Å		CoGa3 alloy: Ga 0.75	experimental	[1] Chari 2010 cites Meyer 1997 doi	Table 3, p. 5, row 6 report
Lattice a	6.26 Å	0	CoGa3 alloy: Ga 0.75	DFT	[1] Chari 2010	Table 3, p. 5, row 5 report
Lattice a	6.106 Å	0	CoGa3 alloy: Ga 0.75	DFT	[1] Chari 2010	Table 3, p. 5, row 4 report
Lattice a	2.886 Å	0	β	DFT	[1] Chari 2010	Table 3, p. 5, row 2 report
Lattice a	2.813 Å	0	β	DFT	[1] Chari 2010	Table 3, p. 5, row 1 report
Lattice a	2.88 Å		β	experimental	[1] Chari 2010 cites Whittle 1980 doi	Table 3, p. 5, row 3 report
Lattice c	6.442 Å		CoGa3 alloy: Ga 0.75	experimental	[1] Chari 2010 cites Meyer 1997 doi	Table 3, p. 5, row 9 report
Lattice c	6.295 Å	0	CoGa3 alloy: Ga 0.75	DFT	[1] Chari 2010	Table 3, p. 5, row 7 report
Lattice c	6.471 Å	0	CoGa3 alloy: Ga 0.75	DFT	[1] Chari 2010	Table 3, p. 5, row 8 report

Sources

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

Arpita Chari, Andres Garay, Raymundo Arróyave, Thermodynamic remodeling of the Co–Ga system, Calphad 34, 189-195 (2010). doi:10.1016/j.calphad.2010.02.004
Xuping Su, Jean-Claude Tedenac, Thermodynamic modeling of the cobalt–gallium system, Intermetallics 13, 467-473 (2005). doi:10.1016/j.intermet.2004.08.003
J. Gröbner, R. Wenzel, G. G. Fischer, R. Schmid-Fetzer, Thermodynamic calculation of the binary systems M-Ga and investigation of ternary M-Ga-N phase equilibria (M=Ni, Co, Pd, Cr), JPE 20, 615-625 (1999). doi:10.1361/105497199770340608

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-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
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); 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_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@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}
}