Cu–Th system

18 accepted literature values from 1 paper(s) (experimental 9, model 9); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	9
model	9

Accepted values by property group
Property group	Values
invariant reaction	18

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
CuTh-08Wan.tdb	C.P. Wang, Y.F. Li, X.J. Liu, K. Ishida, J. Alloys Compd., 458, 208-13(2008). doi:10.1016/j.jallcom.2007.04.017	`8ae901d23dd6c3e4c94a96d26ebbd294a06b48367d263fe1cdb800dc8ffb9462`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuTh-08Wan.tdb	1633.42	LIQUID (x(Th) 0.82872) + FCC_A1 (x(Th) 0.99867) + BCC_A2 (x(Th) 0.99871)
CuTh-08Wan.tdb	1293.75	CU6TH (x(Th) 0.14286) + LIQUID (x(Th) 0.18578) + CU18TH5 (x(Th) 0.21739)
CuTh-08Wan.tdb	1293.75	CU6TH (x(Th) 0.14286) + LIQUID (x(Th) 0.18575) + CU18TH5 (x(Th) 0.21739)
CuTh-08Wan.tdb	1293.75	CU6TH (x(Th) 0.14286) + LIQUID (x(Th) 0.18574) + CU18TH5 (x(Th) 0.21739)
CuTh-08Wan.tdb	1274.45	CUTH2_C16 (x(Th) 0.66667) + LIQUID (x(Th) 0.70154) + FCC_A1 (x(Th) 0.99806)
CuTh-08Wan.tdb	1274.45	CUTH2_C16 (x(Th) 0.66667) + LIQUID (x(Th) 0.70149) + FCC_A1 (x(Th) 0.99806)
CuTh-08Wan.tdb	1257.3	CU18TH5 (x(Th) 0.21739) + LIQUID (x(Th) 0.26467) + CU2TH_C32 (x(Th) 0.33333)
CuTh-08Wan.tdb	1257.29	CU18TH5 (x(Th) 0.21739) + LIQUID (x(Th) 0.26489) + CU2TH_C32 (x(Th) 0.33333)
CuTh-08Wan.tdb	1206.78	FCC_A1 (x(Th) 1.000e-5) + LIQUID (x(Th) 0.07361) + CU6TH (x(Th) 0.14286)
CuTh-08Wan.tdb	1206.78	FCC_A1 (x(Th) 1.000e-5) + LIQUID (x(Th) 0.07365) + CU6TH (x(Th) 0.14286)
CuTh-08Wan.tdb	1206.78	FCC_A1 (x(Th) 1.000e-5) + LIQUID (x(Th) 0.07357) + CU6TH (x(Th) 0.14286)
CuTh-08Wan.tdb	1157.84	CU2TH_C32 (x(Th) 0.33333) + LIQUID (x(Th) 0.48789) + CUTH2_C16 (x(Th) 0.66667)
CuTh-08Wan.tdb	967.14	FCC_A1 (x(Th) 1.000e-5) + CU6TH (x(Th) 0.14286) + CU18TH5 (x(Th) 0.21739)
CuTh-08Wan.tdb	967.14	FCC_A1 (x(Th) 1.000e-5) + CU6TH (x(Th) 0.14286) + CU18TH5 (x(Th) 0.21739)
CuTh-08Wan.tdb	869.58	FCC_A1 (x(Th) 0) + CU18TH5 (x(Th) 0.21739) + CU2TH_C32 (x(Th) 0.33333)
CuTh-08Wan.tdb	869.58	FCC_A1 (x(Th) 0) + CU18TH5 (x(Th) 0.21739) + CU2TH_C32 (x(Th) 0.33333)
CuTh-08Wan.tdb	481.42	FCC_A1 (x(Th) 0) + CU18TH5 (x(Th) 0.21739) + CU2TH_C32 (x(Th) 0.33333)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–Th system (18)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1328.15	congruent melting: L -> Cu6Th	L: Th 0.1429; Cu6Th: Cu 0.857143, Th 0.142857	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 11 report
1327.75	congruent melting: L -> Cu6Th	L: Th 0.1429; Cu6Th: Cu 0.857143, Th 0.142857	model	[1] Wang 2008	Table 3, p. 3, row 12 report
1325.15	congruent melting: L -> Cu3.6Th	L: Th 0.2174; Cu3.6Th: Cu 0.782609, Th 0.217391	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 13 report
1325.05	congruent melting: L -> Cu3.6Th	L: Th 0.2174; Cu3.6Th: Cu 0.782609, Th 0.217391	model	[1] Wang 2008	Table 3, p. 3, row 14 report
1293.35	eutectic: L -> Cu6Th + Cu3.6Th	L: Th 0.186; Cu6Th: Cu 0.857143, Th 0.142857; Cu3.6Th: Cu 0.782609, Th 0.217391	model	[1] Wang 2008	Table 3, p. 3, row 4 report
1293.15	eutectic: L -> Cu6Th + Cu3.6Th	L: Th 0.18; Cu6Th: Cu 0.857143, Th 0.142857; Cu3.6Th: Cu 0.782609, Th 0.217391	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 3 report
1288.15	congruent melting: L -> Cu2Th	L: Th 0.3333; Cu2Th: Cu 0.666667, Th 0.333333	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 15 report
1288.15	congruent melting: L -> Cu2Th	L: Th 0.3333; Cu2Th: Cu 0.666667, Th 0.333333	model	[1] Wang 2008	Table 3, p. 3, row 16 report
1280.15	congruent melting: L -> CuTh2	L: Th 0.6667; CuTh2: Cu 0.333333, Th 0.666667	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 17 report
1277.95	congruent melting: L -> CuTh2	L: Th 0.6667; CuTh2: Cu 0.333333, Th 0.666667	model	[1] Wang 2008	Table 3, p. 3, row 18 report
1275.05	eutectic: L -> CuTh2 + (αTh)	L: Th 0.702; CuTh2: Cu 0.333333, Th 0.666667	model	[1] Wang 2008	Table 3, p. 3, row 10 report
1273.15	eutectic: L -> CuTh2 + (αTh)	L: Th 0.7; CuTh2: Cu 0.333333, Th 0.666667	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 9 report
1257.75	eutectic: L -> Cu3.6Th + Cu2Th	L: Th 0.265; Cu3.6Th: Cu 0.782609, Th 0.217391; Cu2Th: Cu 0.666667, Th 0.333333	model	[1] Wang 2008	Table 3, p. 3, row 6 report
1253.15	eutectic: L -> Cu3.6Th + Cu2Th	L: Th 0.26; Cu3.6Th: Cu 0.782609, Th 0.217391; Cu2Th: Cu 0.666667, Th 0.333333	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 5 report
1208.15	eutectic: L -> (Cu) + Cu6Th	L: Th 0.07; Cu6Th: Cu 0.857143, Th 0.142857	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 1 report
1206.05	eutectic: L -> (Cu) + Cu6Th	L: Th 0.074; Cu6Th: Cu 0.857143, Th 0.142857	model	[1] Wang 2008	Table 3, p. 3, row 2 report
1157.75	eutectic: L -> Cu2Th + CuTh2	L: Th 0.488; Cu2Th: Cu 0.666667, Th 0.333333; CuTh2: Cu 0.333333, Th 0.666667	model	[1] Wang 2008	Table 3, p. 3, row 8 report
1153.15	eutectic: L -> Cu2Th + CuTh2	L: Th 0.49; Cu2Th: Cu 0.666667, Th 0.333333; CuTh2: Cu 0.333333, Th 0.666667	experimental	[1] Wang 2008 cites Schiltz 1971 doi	Table 3, p. 3, row 7 report

Sources

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

C.P. Wang, Y.F. Li, X.J. Liu, K. Ishida, Thermodynamic assessments of the Cu–Th and Mo–Th systems, Journal of Alloys and Compounds 458, 208-213 (2008). doi:10.1016/j.jallcom.2007.04.017

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}
}