Cu–Se system

16 accepted literature values from 1 paper(s) (experimental 16); 2 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	16

Accepted values by property group
Property group	Values
crystal structure	16

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
CuSe-08Du.tdb	Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008). doi:10.3139/146.101636	`47155ae6b8c026d311a7dd207a7881e22c7e87435c32d5ee0af0c9b21e184565`	viewer · TDB · JSON
CuSe-23Liu.tdb	R. Liu, J. Wang, D. Cui, J. Phase Equilib. Diffus, 44, 687-703(2023). doi:10.1007/s11669-023-01074-8	`c43a98dbd013656183743d5615fc7d6cd398a9caa4d9261c390d6521b7a16a2e`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
CuSe-08Du.tdb	1379.58	LIQUID#2 (x(Se) 0.0298) + LIQUID (x(Se) 0.32143) + CU2SE_BETA (x(Se) 0.33334)
CuSe-08Du.tdb	1335.48	FCC_A1 (x(Se) 0) + LIQUID (x(Se) 0.02067) + CU2SE_BETA (x(Se) 0.33333)
CuSe-08Du.tdb	795.64	CU2SE_BETA (x(Se) 0.36305) + LIQUID#2 (x(Se) 0.51568) + LIQUID (x(Se) 0.99854)
CuSe-08Du.tdb	652.72	CU2SE_BETA (x(Se) 0.36061) + CUSE_B18 (x(Se) 0.5) + LIQUID (x(Se) 0.99991)
CuSe-08Du.tdb	604.95	CUSE_B18 (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667) + LIQUID (x(Se) 0.99997)
CuSe-08Du.tdb	494	CUSE2_C18 (x(Se) 0.66667) + HEXAGONAL_A8 (x(Se) 1) + LIQUID (x(Se) 1)
CuSe-08Du.tdb	410.42	CUSE_B18 (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667)
CuSe-08Du.tdb	410.42	CU2SE_BETA (x(Se) 0.35186) + CUSE_B18 (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5)
CuSe-08Du.tdb	410.42	CU2SE_BETA (x(Se) 0.35187) + CUSE_BETA (x(Se) 0.5) + CUSE_B18 (x(Se) 0.5)
CuSe-08Du.tdb	396	FCC_A1 (x(Se) 0) + CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.33333)
CuSe-08Du.tdb	386.32	CU2SE_BETA (x(Se) 0.35042) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-08Du.tdb	386.32	CU2SE_BETA (x(Se) 0.35046) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-08Du.tdb	386.32	CU2SE_BETA (x(Se) 0.35041) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-08Du.tdb	377.74	CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.34884) + CU3SE2 (x(Se) 0.4)
CuSe-08Du.tdb	377.74	CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.3488) + CU3SE2 (x(Se) 0.4)
CuSe-08Du.tdb	326.81	CUSE_BETA (x(Se) 0.5) + CUSE_ALPHA (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667)
CuSe-08Du.tdb	326.81	CU3SE2 (x(Se) 0.4) + CUSE_ALPHA (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5)
CuSe-23Liu.tdb	1386.24	LIQUID#2 (x(Se) 0.03111) + LIQUID (x(Se) 0.32033) + CU2SE_BETA (x(Se) 0.33333)
CuSe-23Liu.tdb	1335.63	FCC_A1 (x(Se) 0) + LIQUID (x(Se) 0.02052) + CU2SE_BETA (x(Se) 0.33333)
CuSe-23Liu.tdb	786.81	CU2SE_BETA (x(Se) 0.36286) + LIQUID#2 (x(Se) 0.51364) + LIQUID (x(Se) 0.99868)
CuSe-23Liu.tdb	652.66	CU2SE_BETA (x(Se) 0.36066) + CUSE_B18 (x(Se) 0.5) + LIQUID (x(Se) 0.9999)
CuSe-23Liu.tdb	610.5	CUSE_B18 (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667) + LIQUID (x(Se) 0.99996)
CuSe-23Liu.tdb	494	CUSE2_C18 (x(Se) 0.66667) + HEXAGONAL_A8 (x(Se) 1) + LIQUID (x(Se) 1)
CuSe-23Liu.tdb	409.15	CUSE_B18 (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667)
CuSe-23Liu.tdb	409.15	CU2SE_BETA (x(Se) 0.35196) + CUSE_B18 (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5)
CuSe-23Liu.tdb	396	FCC_A1 (x(Se) 0) + CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.33333)
CuSe-23Liu.tdb	390.33	CU2SE_BETA (x(Se) 0.35077) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-23Liu.tdb	390.33	CU2SE_BETA (x(Se) 0.35078) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-23Liu.tdb	390.33	CU2SE_BETA (x(Se) 0.35075) + CU3SE2 (x(Se) 0.4) + CUSE_BETA (x(Se) 0.5)
CuSe-23Liu.tdb	378.31	CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.34857) + CU3SE2 (x(Se) 0.4)
CuSe-23Liu.tdb	378.31	CU2SE_ALPHA (x(Se) 0.33333) + CU2SE_BETA (x(Se) 0.34855) + CU3SE2 (x(Se) 0.4)
CuSe-23Liu.tdb	328.45	CUSE_BETA (x(Se) 0.5) + CUSE_ALPHA (x(Se) 0.5) + CUSE2_C18 (x(Se) 0.66667)
CuSe-23Liu.tdb	328.45	CU3SE2 (x(Se) 0.4) + CUSE_ALPHA (x(Se) 0.5) + CUSE_BETA (x(Se) 0.5)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull CuSe-08Du

Other properties

Crystal structure (16)

Crystal structure, Cu–Se system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	5.86 Å		β-Cu2Se alloy: Se 0.333333	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 14 report
Lattice a	3.954 Å		β-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 11 report
Lattice a	6.385 Å	298.15	Cu3Se2 alloy: Se 0.4	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 15 report
Lattice a	5.0046 Å	298.15	CuSe2 alloy: Se 0.666667	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 16 report
Lattice a	14.087 Å	298.15	α-Cu2Se alloy: Se 0.333333	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 13 report
Lattice a	14.203 Å	298.15	α-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Stevels 1971 doi	Table 1, p. 3, row 10 report
Lattice a	3.983 Å	298.15	γ-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 12 report
Lattice b	6.856 Å		β-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 11 report
Lattice b	6.856 Å	298.15	CuSe2 alloy: Se 0.666667	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 16 report
Lattice b	20.481 Å	298.15	α-Cu2Se alloy: Se 0.333333	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 13 report
Lattice c	17.238 Å		β-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 11 report
Lattice c	4.271 Å	298.15	Cu3Se2 alloy: Se 0.4	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 15 report
Lattice c	3.7397 Å	298.15	CuSe2 alloy: Se 0.666667	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 16 report
Lattice c	4.145 Å	298.15	α-Cu2Se alloy: Se 0.333333	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 13 report
Lattice c	17.255 Å	298.15	α-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Stevels 1971 doi	Table 1, p. 3, row 10 report
Lattice c	17.26 Å	298.15	γ-CuSe alloy: Se 0.5	experimental	[1] Liu 2023 cites Murray 1975 doi	Table 1, p. 3, row 12 report

Sources

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

Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023). doi:10.1007/s11669-023-01074-8

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}
}