Cu–Se–Te system

63 accepted literature values from 1 paper(s) (experimental 55, model 8); 0 calculated phase diagram(s). 2 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

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Accepted values by evidence class
Evidence class	Values
experimental	55
model	8

Accepted values by property group
Property group	Values
invariant reaction	8
phase equilibrium	55

Invariant reactions (literature)

Invariant reactions reported in the literature for the Cu–Se–Te system (8)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
812.45	quasi-peritectic: β-Cu2SeTe + Liquid -> β-Cu4Te3 + τ2	Liquid: Cu 0.5733, Se 0.0984, Te 0.3283	model	[1] Hutabalian 2023	Table 5, p. 17, row 1 report
676.95	quasi-peritectic: β-Cu4Te3 + Liquid -> β-CuTe + τ2	Liquid: Cu 0.3896, Se 0.0296, Te 0.5808	model	[1] Hutabalian 2023	Table 5, p. 17, row 2 report
676.05	eutectic: β-Cu2SeTe + Hexagonal_A8 + τ1 -> Liquid	Liquid: Cu 0.1511, Se 0.2281, Te 0.6208	model	[1] Hutabalian 2023	Table 5, p. 17, row 4 report
673.75	eutectic: β-Cu2SeTe + Hexagonal_A8 + τ2 -> Liquid	Liquid: Cu 0.3059, Se 0.1069, Te 0.5872	model	[1] Hutabalian 2023	Table 5, p. 17, row 3 report
658.55	quasi-peritectic: Liquid + β-Cu2SeTe -> τ1 + γ-CuSe	Liquid: Cu 2.000e-4, Se 0.9233, Te 0.0765	model	[1] Hutabalian 2023	Table 5, p. 17, row 5 report
619.85	quasi-peritectic: α-CuTe + β-CuTe -> Liquid + τ2	Liquid: Cu 0.323, Se 0.0243, Te 0.6527	model	[1] Hutabalian 2023	Table 5, p. 17, row 6 report
619.85	peritectic: Hexagonal_A8 + β-CuTe -> Liquid + α-CuTe	Liquid: Cu 0.296, Se 0.0079, Te 0.6961	model	[1] Hutabalian 2023	Table 5, p. 17, row 7 report
615.15	eutectic: Hexagonal_A8 + τ2 + α-CuTe -> Liquid	Liquid: Cu 0.3172, Se 0.0242, Te 0.6586	model	[1] Hutabalian 2023	Table 5, p. 17, row 8 report

Other properties

Phase equilibrium (55)

Phase equilibrium, Cu–Se–Te system
Property	T (K)	Phases / composition	Class	Source	Location	Quote
Phase assemblage	773.15	Cu + Cu2(Se,Te) alloy: Se 0.15, Te 0.15	experimental	[1] Hutabalian 2023	p. 5 report	Following a similar analytical determination, the equilibrium phases at 500 C in the Cu-Se-Te system were established. Figure 5(a), (b), (c), (d), (e), (f), (g), (h), (i) and (j) are the BEI micrographs of alloys #1, 2, 6, 7, 8, 13, 14, 22, 23, and 25, respectively. As shown in Fig. 5(a) and (b), alloys #1 (Cu10at.%Se-10at.%Te) and #2 (Cu-15at.%Se-15at.%Te) were both determined to be in a two-pha…
Phase assemblage	773.15	Cu + Cu2(Se,Te) alloy: Se 0.1, Te 0.1	experimental	[1] Hutabalian 2023	p. 5 report	Following a similar analytical determination, the equilibrium phases at 500 C in the Cu-Se-Te system were established. Figure 5(a), (b), (c), (d), (e), (f), (g), (h), (i) and (j) are the BEI micrographs of alloys #1, 2, 6, 7, 8, 13, 14, 22, 23, and 25, respectively. As shown in Fig. 5(a) and (b), alloys #1 (Cu10at.%Se-10at.%Te) and #2 (Cu-15at.%Se-15at.%Te) were both determined to be in a two-pha…
Phase assemblage	773.15	Cu2(Se,Te) alloy: Se 0.15, Te 0.15	experimental	[1] Hutabalian 2023	p. 5 report	Following a similar analytical determination, the equilibrium phases at 500 C in the Cu-Se-Te system were established. Figure 5(a), (b), (c), (d), (e), (f), (g), (h), (i) and (j) are the BEI micrographs of alloys #1, 2, 6, 7, 8, 13, 14, 22, 23, and 25, respectively. As shown in Fig. 5(a) and (b), alloys #1 (Cu10at.%Se-10at.%Te) and #2 (Cu-15at.%Se-15at.%Te) were both determined to be in a two-ph…
Phase assemblage	773.15	Cu2Se + s1 + liquid alloy: Se 0.315, Te 0.325	experimental	[1] Hutabalian 2023	p. 2 report	The chemical composition of the dark phase is Cu-35.18at.%Se1.28at.%Te, which is the Cu2Se phase, and the composition of the gray phase is Cu-42.68at.%Se-23.27at.%Te, which is a ternary phase. Hereafter, this phase is denoted as the s1 phase. The dendritic microstructure contains a white matrix and some gray precipitate phases. Its average composition is Cu-32.12at.%Se-40.39at.%Te which was a liq…
Phase composition		(Se,Te) (Se,Te): Cu 0.0087, Se 0.1313, Te 0.86	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 21 report
Phase composition		(Se,Te) (Se,Te): Cu 0.07, Se 0.049, Te 0.881	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 25 report
Phase composition		(Se,Te) (Se,Te): Cu 0.143, Se 0.128, Te 0.709	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 22 report
Phase composition		(Se,Te) (Se,Te): Cu 0.204, Se 0.188, Te 0.608	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 19 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.629, Se 0.305, Te 0.066	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 24 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.619, Se 0.376, Te 0.005	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 5 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.648, Se 0.26, Te 0.092	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 8 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.631, Se 0.363, Te 0.006	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 9 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.645, Se 0.303, Te 0.052	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 4 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.646, Se 0.326, Te 0.028	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 7 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.649, Se 0.297, Te 0.054	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 10 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.655, Se 0.301, Te 0.044	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 3 report
Phase composition		Cu2(Se,Te) Cu2(Se,Te): Cu 0.62, Se 0.094, Te 0.286	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 2 report
Phase composition		Cu4Te3 Cu4Te3: Cu 0.5796, Se 0.0318, Te 0.3886	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 11 report
Phase composition		τ1 τ1: Cu 0.354, Se 0.383, Te 0.263	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 17 report
Phase composition		τ1 τ1: Cu 0.343, Se 0.422, Te 0.235	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 20 report
Phase composition		τ1 τ1: Cu 0.304, Se 0.608, Te 0.088	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 12 report
Phase composition		τ1 τ1: Cu 0.354, Se 0.422, Te 0.224	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 26 report
Phase composition		τ1 τ1: Cu 0.327, Se 0.465, Te 0.208	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 14 report
Phase composition		τ1 τ1: Cu 0.345, Se 0.405, Te 0.25	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 13 report
Phase composition		τ1 τ1: Cu 0.335, Se 0.41, Te 0.255	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 18 report
Phase composition		τ1 τ1: Cu 0.327, Se 0.464, Te 0.208	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 16 report
Phase composition		τ2 τ2: Cu 0.631, Se 0.225, Te 0.144	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 1 report
Phase composition		τ2 τ2: Cu 0.604, Se 0.182, Te 0.214	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 23 report
Phase composition		τ2 τ2: Cu 0.622, Se 0.119, Te 0.259	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 6 report
Phase composition		τ2 τ2: Cu 0.621, Se 0.157, Te 0.222	experimental	[1] Hutabalian 2023	Table 2, p. 8, row 15 report
Phase composition	773.15	Cu + Cu₂(Se,Te) + Cu2(Se,Te) Cu: Cu 0.9957, Se 0.0041, Te 2.000e-4; Cu₂(Se,Te): Cu 0.678, Se 0.1509, Te 0.1711; Cu2(Se,Te): Cu 0.678, Se 0.1509, Te 0.1711	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 2 report
Phase composition	773.15	Cu + Cu₂(Se,Te) + Cu2(Se,Te) Cu: Cu 0.9988, Se 2.000e-4, Te 0.001; Cu₂(Se,Te): Cu 0.683, Se 0.143, Te 0.1708; Cu2(Se,Te): Cu 0.683, Se 0.143, Te 0.1708	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 1 report
Phase composition	773.15	Cu + Cu₂(Se,Te) + Cu2(Se,Te) Cu: Cu 0.9971, Se 0.0017, Te 0.0012; Cu₂(Se,Te): Cu 0.6781, Se 0.1163, Te 0.2056; Cu2(Se,Te): Cu 0.6781, Se 0.1163, Te 0.2056	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 9 report
Phase composition	773.15	Cu₂(Se,Te) + Cu2(Se,Te) Cu₂(Se,Te): Cu 0.6842, Se 0.2221, Te 0.0937; Cu2(Se,Te): Cu 0.6842, Se 0.2221, Te 0.0937	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 4 report
Phase composition	773.15	Cu₂(Se,Te) + Cu2(Se,Te) Cu₂(Se,Te): Cu 0.6746, Se 0.0622, Te 0.2632; Cu2(Se,Te): Cu 0.6746, Se 0.0622, Te 0.2632	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 5 report
Phase composition	773.15	Cu₂(Se,Te) + Cu2(Se,Te) Cu₂(Se,Te): Cu 0.6555, Se 0.0255, Te 0.319; Cu2(Se,Te): Cu 0.6555, Se 0.0255, Te 0.319	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 6 report
Phase composition	773.15	Cu₂(Se,Te) + Cu2(Se,Te) Cu₂(Se,Te): Cu 0.6795, Se 0.245, Te 0.0755; Cu2(Se,Te): Cu 0.6795, Se 0.245, Te 0.0755	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 3 report
Phase composition	773.15	Cu₂(Se,Te) + Cu₄Te₃ + τ₂ + Cu2(Se,Te) + Cu4Te3 Cu₂(Se,Te): Cu 0.648, Se 0.0366, Te 0.3154; Cu₄Te₃: Cu 0.6247, Se 0.0468, Te 0.3284; Cu2(Se,Te): Cu 0.648, Se 0.0366, Te 0.3154; Cu4Te3: Cu 0.6247, Se 0.0468, Te 0.3284	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 7 report
Phase composition	773.15	Cu₂(Se,Te) + Cu₄Te₃ + τ₂ + Cu2(Se,Te) + Cu4Te3 Cu₂(Se,Te): Cu 0.6699, Se 0.1415, Te 0.1886; Cu₄Te₃: Cu 0.6358, Se 0.1281, Te 0.236; Cu2(Se,Te): Cu 0.6699, Se 0.1415, Te 0.1886; Cu4Te3: Cu 0.6358, Se 0.1281, Te 0.236	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 8 report
Phase composition	773.15	Cu₂Se + Liquid + Cu2Se Cu₂Se: Cu 0.6183, Se 0.3246, Te 0.0571; Liquid: Cu 0.0263, Se 0.0224, Te 0.9513; Cu2Se: Cu 0.6183, Se 0.3246, Te 0.0571	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 18 report
Phase composition	773.15	Cu₂Se + Liquid + Cu2Se Cu₂Se: Cu 0.658, Se 0.2899, Te 0.0521; Liquid: Cu 0.2937, Se 0.2229, Te 0.4834; Cu2Se: Cu 0.658, Se 0.2899, Te 0.0521	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 11 report
Phase composition	773.15	Cu₂Se + τ₁ + Liquid + Cu2Se + τ1 Cu₂Se: Cu 0.6026, Se 0.3916, Te 0.0058; τ₁: Cu 0.3424, Se 0.4443, Te 0.2133; Liquid: Cu 0.2695, Se 0.3031, Te 0.4274; Cu2Se: Cu 0.6026, Se 0.3916, Te 0.0058; τ1: Cu 0.3424, Se 0.4443, Te 0.2133	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 17 report
Phase composition	773.15	Cu₂Se + τ₁ + Liquid + Cu2Se + τ1 Cu₂Se: Cu 0.6216, Se 0.3298, Te 0.0486; τ₁: Cu 0.3424, Se 0.4451, Te 0.2125; Liquid: Cu 0.2782, Se 0.2382, Te 0.4836; Cu2Se: Cu 0.6216, Se 0.3298, Te 0.0486; τ1: Cu 0.3424, Se 0.4451, Te 0.2125	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 21 report
Phase composition	773.15	Cu₂Se + τ₁ + Liquid + Cu2Se + τ1 Cu₂Se: Cu 0.6183, Se 0.3797, Te 0.002; τ₁: Cu 0.3347, Se 0.4605, Te 0.2048; Cu2Se: Cu 0.6183, Se 0.3797, Te 0.002; τ1: Cu 0.3347, Se 0.4605, Te 0.2048	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 20 report
Phase composition	773.15	Cu₂Se + τ₁ + Liquid + Cu2Se + τ1 Cu₂Se: Cu 0.6354, Se 0.3518, Te 0.0128; τ₁: Cu 0.3405, Se 0.4268, Te 0.2327; Liquid: Cu 0.2749, Se 0.3212, Te 0.4039; Cu2Se: Cu 0.6354, Se 0.3518, Te 0.0128; τ1: Cu 0.3405, Se 0.4268, Te 0.2327	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 12 report
Phase composition	773.15	Cu₂Se + τ₂ + Cu2Se + τ2 Cu₂Se: Cu 0.5804, Se 0.0572, Te 0.3623; τ₂: Cu 0.6214, Se 0.1722, Te 0.2064; Cu2Se: Cu 0.5804, Se 0.0572, Te 0.3623; τ2: Cu 0.6214, Se 0.1722, Te 0.2064	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 16 report
Phase composition	773.15	Cu₂Se + τ₂ + Cu2Se + τ2 Cu₂Se: Cu 0.6388, Se 0.269, Te 0.0922; τ₂: Cu 0.6238, Se 0.2115, Te 0.1647; Cu2Se: Cu 0.6388, Se 0.269, Te 0.0922; τ2: Cu 0.6238, Se 0.2115, Te 0.1647	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 15 report
Phase composition	773.15	Cu₄Te₃ + Liquid + τ₂ + Cu4Te3 + τ2 Cu₄Te₃: Cu 0.52, Se 0.0137, Te 0.4663; Liquid: Cu 0.3414, Se 0.0501, Te 0.6085; τ₂: Cu 0.6136, Se 0.141, Te 0.2454; Cu4Te3: Cu 0.52, Se 0.0137, Te 0.4663; τ2: Cu 0.6136, Se 0.141, Te 0.2454	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 25 report
Phase composition	773.15	τ₁ + Liquid + τ1 τ₁: Cu 0.3231, Se 0.4438, Te 0.2331; Liquid: Cu 0.1581, Se 0.3653, Te 0.4766; τ1: Cu 0.3231, Se 0.4438, Te 0.2331	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 13 report
Phase composition	773.15	τ₁ + Liquid + τ1 τ₁: Cu 0.3185, Se 0.4467, Te 0.2348; Liquid: Cu 0.0929, Se 0.4238, Te 0.4833; τ1: Cu 0.3185, Se 0.4467, Te 0.2348	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 14 report
Phase composition	773.15	τ₂ + Liquid + Cu₂Se + τ2 + Cu2Se τ₂: Cu 0.6363, Se 0.2013, Te 0.1624; Liquid: Cu 0.3058, Se 0.1988, Te 0.4954; Cu₂Se: Cu 0.6521, Se 0.2616, Te 0.0863; τ2: Cu 0.6363, Se 0.2013, Te 0.1624; Cu2Se: Cu 0.6521, Se 0.2616, Te 0.0863	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 19 report
Phase composition	773.15	τ₂ + Liquid + τ2 τ₂: Cu 0.6225, Se 0.1762, Te 0.2013; Liquid: Cu 0.3284, Se 0.0808, Te 0.5908; τ2: Cu 0.6225, Se 0.1762, Te 0.2013	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 22 report
Phase composition	773.15	τ₂ + Liquid + τ2 τ₂: Cu 0.6188, Se 0.1819, Te 0.1993; Liquid: Cu 0.2416, Se 0.1686, Te 0.5898; τ2: Cu 0.6188, Se 0.1819, Te 0.1993	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 23 report
Phase composition	773.15	τ₂ + τ2 τ₂: Cu 0.6404, Se 0.169, Te 0.1906; τ2: Cu 0.6404, Se 0.169, Te 0.1906	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 10 report
Phase composition	773.15	τ₂ + τ2 τ₂: Cu 0.6222, Se 0.1863, Te 0.1915; τ2: Cu 0.6222, Se 0.1863, Te 0.1915	experimental	[1] Hutabalian 2023	Table 1, p. 3, row 24 report

Sources

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

Yohanes Hutabalian, Sinn-wen Chen, Wojciech Gierlotka, Phase Equilibria of the Cu-Se-Te Ternary System, J. Phase Equilib. Diffus. 44, 181-199 (2023). doi:10.1007/s11669-023-01032-4

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 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_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}
}