Co–U system

22 accepted literature values from 1 paper(s) (experimental 11, model 11); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (12) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	11
model	11

Accepted values by property group
Property group	Values
invariant reaction	22

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
CoU-08Wan.tdb	J. Wang, X.J. Liu, C.P. Wang, J. Nucl. Mater., 374, 79-86(2008). doi:10.1016/j.jnucmat.2007.06.023	`91f49d0dd36e4d3c701b994867413f07d097496dc1f697d32bb78e0f24d20158`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CoU-08Wan.tdb	1394.64	FCC_A1 (x(U) 3.000e-5) + LIQUID (x(U) 0.13122) + CO11U2 (x(U) 0.15385)
CoU-08Wan.tdb	1394.64	FCC_A1 (x(U) 3.000e-5) + LIQUID (x(U) 0.13121) + CO11U2 (x(U) 0.15385)
CoU-08Wan.tdb	1387.22	CO11U2 (x(U) 0.15385) + LIQUID (x(U) 0.19001) + CO4U (x(U) 0.2)
CoU-08Wan.tdb	1387.21	CO11U2 (x(U) 0.15385) + LIQUID (x(U) 0.19016) + CO4U (x(U) 0.2)
CoU-08Wan.tdb	1386.01	CO4U (x(U) 0.2) + LIQUID (x(U) 0.21554) + CO2U_C15 (x(U) 0.30036)
CoU-08Wan.tdb	1386.01	CO4U (x(U) 0.2) + LIQUID (x(U) 0.21559) + CO2U_C15 (x(U) 0.30037)
CoU-08Wan.tdb	1111.22	CO4U (x(U) 0.2) + CO3U (x(U) 0.25) + CO2U_C15 (x(U) 0.2944)
CoU-08Wan.tdb	1111.22	CO4U (x(U) 0.2) + CO3U (x(U) 0.25) + CO2U_C15 (x(U) 0.2944)
CoU-08Wan.tdb	1097.55	LIQUID (x(U) 0.78351) + COU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.96579)
CoU-08Wan.tdb	1097.55	LIQUID (x(U) 0.78358) + COU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.96583)
CoU-08Wan.tdb	1075.63	CO2U_C15 (x(U) 0.3336) + COU_BA (x(U) 0.5) + LIQUID (x(U) 0.56669)
CoU-08Wan.tdb	1031.83	COU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99149) + TETRAGONAL_U (x(U) 1)
CoU-08Wan.tdb	1031.83	COU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99143) + TETRAGONAL_U (x(U) 1)
CoU-08Wan.tdb	1014.02	COU_BA (x(U) 0.5) + LIQUID (x(U) 0.64688) + COU6_D2C (x(U) 0.85714)
CoU-08Wan.tdb	1014.02	COU_BA (x(U) 0.5) + LIQUID (x(U) 0.64676) + COU6_D2C (x(U) 0.85714)
CoU-08Wan.tdb	942.02	COU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)
CoU-08Wan.tdb	694.99	HCP_A3 (x(U) 0) + FCC_A1 (x(U) 0) + CO11U2 (x(U) 0.15385)
CoU-08Wan.tdb	324.47	HCP_A3 (x(U) 0) + CO11U2 (x(U) 0.15385) + CO4U (x(U) 0.2)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Co–U system (22)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1458.15	congruent melting: L -> Co2U	L: Co 0.667; Co2U: Co 0.667	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 17 report
1456.15	congruent melting: L -> Co2U	L: Co 0.667; Co2U: Co 0.667	model	[1] Wang 2008	Table 3, p. 7, row 18 report
1403.15	congruent melting: L -> Co11 U2	L: Co 0.846; Co11 U2: Co 0.846	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 19 report
1398.15	congruent melting: L -> Co11 U2	L: Co 0.846; Co11 U2: Co 0.846	model	[1] Wang 2008	Table 3, p. 7, row 20 report
1393.15	congruent melting: L -> Co4U	L: Co 0.8; Co4U: Co 0.8	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 21 report
1393.15	eutectic: L -> fcc (Co) + Co11 U2	L: Co 0.969; fcc (Co): Co 1; Co11 U2: Co 0.846	model	[1] Wang 2008	Table 3, p. 7, row 6 report
1393.15	eutectic: L -> fcc (Co) + Co11 U2	L: Co 0.96; fcc (Co): Co 0.9999; Co11 U2: Co 0.846	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 5 report
1387.15	congruent melting: L -> Co4U	L: Co 0.8; Co4U: Co 0.8	model	[1] Wang 2008	Table 3, p. 7, row 22 report
1387.15	eutectic: L -> Co11 U2 + Co4U	L: Co 0.805; Co11 U2: Co 0.846; Co4U: Co 0.8	model	[1] Wang 2008	Table 3, p. 7, row 8 report
1385.15	eutectic: L -> Co4U + Co2U	L: Co 0.779; Co4U: Co 0.8; Co2U: Co 0.667	model	[1] Wang 2008	Table 3, p. 7, row 10 report
1383.15	eutectic: L -> Co11 U2 + Co4U	L: Co 0.82; Co11 U2: Co 0.846; Co4U: Co 0.8	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 7 report
1363.15	eutectic: L -> Co4U + Co2U	L: Co 0.77; Co4U: Co 0.8; Co2U: Co 0.667	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 9 report
1103.15	peritectoid: Co4U + Co2 U -> Co3U	Co4U: Co 0.8; Co2 U: Co 0.75; Co3U: Co 0.75	model	[1] Wang 2008	Table 3, p. 7, row 2 report
1103.15	peritectoid: Co4U + Co2 U -> Co3U	Co4U: Co 0.8; Co2 U: Co 0.75; Co3U: Co 0.75	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 1 report
1099.15	peritectic: L + γ(U) -> CoU 6	L: Co 0.215; γ(U): Co 0.015; CoU 6: Co 0.143	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 13 report
1097.15	peritectic: L + γ(U) -> CoU 6	L: Co 0.216; γ(U): Co 0.032; CoU 6: Co 0.143	model	[1] Wang 2008	Table 3, p. 7, row 14 report
1078.15	peritectic: L + Co2U -> CoU	L: Co 0.427; Co2U: Co 0.667; CoU: Co 0.5	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 15 report
1077.15	peritectic: L + Co2U -> CoU	L: Co 0.437; Co2U: Co 0.667; CoU: Co 0.5	model	[1] Wang 2008	Table 3, p. 7, row 16 report
1031.15	peritectoid: CoU6 + γ (U) -> α (U)	CoU6: Co 0.846; γ (U): Co 0.032; α (U): Co 6.000e-4	model	[1] Wang 2008	Table 3, p. 7, row 4 report
1029.15	peritectoid: CoU6 + γ (U) -> α (U)	CoU6: Co 0.846; γ (U): Co 0.015; α (U): Co 6.000e-4	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 3 report
1010.15	eutectic: L -> CoU + CoU6	L: Co 0.353; CoU: Co 0.5; CoU6: Co 0.143	model	[1] Wang 2008	Table 3, p. 7, row 12 report
1007.15	eutectic: L -> CoU + CoU6	L: Co 0.34; CoU: Co 0.5; CoU6: Co 0.143	experimental	[1] Wang 2008 cites Ishida 2000	Table 3, p. 7, row 11 report

Sources

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

J. Wang, X.J. Liu, C.P. Wang, Thermodynamic modeling of the Al–U and Co–U systems, Journal of Nuclear Materials 374, 79-86 (2008). doi:10.1016/j.jnucmat.2007.06.023

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}
}