Cu–Se phases

12 phases (tier A 6, tier B 1, liquid 1, needs_review 4); 10 stable in a calculated diagram. Structure types are assigned only when the stored evidence supports an assignment under the stated tier rules (tier A: standard phase name; tier B: unique Materials Project + OQMD on-hull match, DFT-supported; tier C: one structure stated by the assessment's crystallographic table, assessor-stated); other phases list candidates and are marked needs_review. Stability is from phase diagrams calculated with pycalphad from the SGTE binary collection (evidence class: model).

Data: interactive registry · full JSON · Cu–Se system page · Markdown · field reference

Phases of the Cu–Se system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
HEXAGONAL_A8 phase:cu-se:a8-hexagonal	gamma-Se · A8 · hP3 · P3_121 (152)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–494 K, x(Se) 1–1	0	2
BCC_A2 phase:cu-se:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
CU2SE_ALPHA phase:cu-se:cu2se-alpha		needs_review	stable in 2 of 2 calculated diagram(s): 300–396 K, x(Se) 0.33333–0.33333	0	2
CU2SE_BETA phase:cu-se:cu2se-beta		needs_review	stable in 2 of 2 calculated diagram(s): 377.74–1433.74 K, x(Se) 0.33333–0.36305	0	2
CU3SE2 phase:cu-se:cu3se2	Cu3Se2 · tP10 · P-42_1m (113)	tier B: DFT-supported (unique MP + OQMD match)	stable in 2 of 2 calculated diagram(s): 300–390.33 K, x(Se) 0.4–0.4	2	2
CUSE_ALPHA phase:cu-se:cuse-alpha		needs_review	stable in 2 of 2 calculated diagram(s): 300–328.45 K, x(Se) 0.5–0.5	0	2
CUSE_B18 phase:cu-se:cuse-b18	CuS · B18 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 409.15–652.72 K, x(Se) 0.5–0.5	0	2
CUSE_BETA phase:cu-se:cuse-beta		needs_review	stable in 2 of 2 calculated diagram(s): 326.81–410.42 K, x(Se) 0.5–0.5	0	2
CUSE2_C18 phase:cu-se:cuse2-c18	alpha-FeS2 · C18 · oP6 · Pnnm (58)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–610.5 K, x(Se) 0.66667–0.66667	0	2
FCC_A1 phase:cu-se:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 2 of 2 calculated diagram(s): 300–1357.77 K, x(Se) 0–0	0	2
HCP_A3 phase:cu-se:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 2 calculated diagram(s)	0	2
LIQUID phase:cu-se:liquid	liquid	liquid	stable in 2 of 2 calculated diagram(s): 494–2500 K, x(Se) 0–1	0	2

HEXAGONAL_A8 (Cu–Se)

Id: phase:cu-se:a8-hexagonal; status assigned
Structure: gamma-Se · A8 · hP3 · P3_121 (152); type st:a8-gamma-se-hp3; tier A: standard phase name; confidence high
Stoichiometry: Se 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–494 K, x(Se) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:a8-hexagonal
tdb: tdb:CuSe-08Du.tdb:HEXAGONAL_A8, tdb:CuSe-23Liu.tdb:HEXAGONAL_A8

TDB models of HEXAGONAL_A8 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: HEXAGONAL_A8, type code %, sha256 47155ae6b8c026d3…

48: PHASE HEXAGONAL_A8 % 1 1 !
49: CONST HEXAGONAL_A8 : SE : !

CuSe-23Liu.tdb: HEXAGONAL_A8, type code %, sha256 c43a98dbd0136561…

52: PHASE HEXAGONAL_A8 % 1 1 !
53: CONST HEXAGONAL_A8 : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

BCC_A2 (Cu–Se)

Id: phase:cu-se:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stoichiometry: Cu 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:bcc-a2
tdb: tdb:CuSe-08Du.tdb:BCC_A2, tdb:CuSe-23Liu.tdb:BCC_A2

TDB models of BCC_A2 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: BCC_A2, type code %B, sha256 47155ae6b8c026d3…

38: PHASE BCC_A2 %B 2 1 3 !
39: CONST BCC_A2 : CU : VA : !

CuSe-23Liu.tdb: BCC_A2, type code %B, sha256 c43a98dbd0136561…

42: PHASE BCC_A2 %B 2 1 3 !
43: CONST BCC_A2 : CU : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CU2SE_ALPHA (Cu–Se)

Id: phase:cu-se:cu2se-alpha; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): Cu2Se-alpha · mC144 · C2/c (15) — Hallstedt 2025 mmc2 row for CU2SE_ALPHA: Cu2Se-alpha
Candidate (tdb_comment): Cu2Se-alpha · mC144 · C2/c, 15 — CuSe-08Du.tdb: 'Prototype Cu2Se-alpha (mC144, C2/c, 15)'
Candidate (tdb_comment): Cu2Se-alpha · mC144 · C2/c — CuSe-23Liu.tdb: 'Prototype Cu2Se-alpha (mC144, C2/c)'
Stability: stable in 2 of 2 calculated diagram(s): 300–396 K, x(Se) 0.33333–0.33333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:cu2se-alpha
tdb: tdb:CuSe-08Du.tdb:CU2SE_ALPHA, tdb:CuSe-23Liu.tdb:CU2SE_ALPHA

TDB models of CU2SE_ALPHA (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CU2SE_ALPHA, type code %, sha256 47155ae6b8c026d3…

53: PHASE CU2SE_ALPHA % 2 2 1 !
54: CONST CU2SE_ALPHA : CU% SE : SE : !

CuSe-23Liu.tdb: CU2SE_ALPHA, type code %, sha256 c43a98dbd0136561…

57: PHASE CU2SE_ALPHA % 2 2 1 !
58: CONST CU2SE_ALPHA : CU% SE : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CU2SE_BETA (Cu–Se)

Id: phase:cu-se:cu2se-beta; status needs_review
No structure assigned. Why: no_structure_token; off_stoichiometric_model
Candidate (sgte_mmc2): Cu2Se-beta · cF44 · Fm-3m (225) — Hallstedt 2025 mmc2 row for CU2SE_BETA: Cu2Se-beta (berzelianite)
Candidate (tdb_comment): Cu2Se-beta · cF44 · Fm-3m — CuSe-08Du.tdb: 'Prototype Cu2Se-beta (cF44, Fm-3m), berzelianite'
Candidate (tdb_comment): Cu2Se-beta · cF44 · Fm-3m — CuSe-23Liu.tdb: 'Prototype Cu2Se-beta (cF44, Fm-3m), berzelianite'
Stability: stable in 2 of 2 calculated diagram(s): 377.74–1433.74 K, x(Se) 0.33333–0.36305
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:cu2se-beta
tdb: tdb:CuSe-08Du.tdb:CU2SE_BETA, tdb:CuSe-23Liu.tdb:CU2SE_BETA

TDB models of CU2SE_BETA (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CU2SE_BETA, type code %, sha256 47155ae6b8c026d3…

58: PHASE CU2SE_BETA % 2 2 1 !
59: CONST CU2SE_BETA : CU% SE : SE : !

CuSe-23Liu.tdb: CU2SE_BETA, type code %, sha256 c43a98dbd0136561…

62: PHASE CU2SE_BETA % 2 2 1 !
63: CONST CU2SE_BETA : CU% SE : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CU3SE2 (Cu–Se)

Id: phase:cu-se:cu3se2; status assigned
Structure: Cu3Se2 · tP10 · P-42_1m (113); type st:cu3se2-tp10; tier B: DFT-supported (unique MP + OQMD match); confidence high
Stoichiometry: Cu 0.6000, Se 0.4000
Stability: stable in 2 of 2 calculated diagram(s): 300–390.33 K, x(Se) 0.4–0.4
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:cu-se:cu3se2
mp: mp:mp-aaaabepn
oqmd: oqmd:oqmd-1659
paper: paper:10.1007/s11669-023-01074-8:Cu3Se2
tdb: tdb:CuSe-08Du.tdb:CU3SE2, tdb:CuSe-23Liu.tdb:CU3SE2

TDB models of CU3SE2 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CU3SE2, type code %, sha256 47155ae6b8c026d3…

63: PHASE CU3SE2 % 2 3 2 !
64: CONST CU3SE2 : CU : SE : !

CuSe-23Liu.tdb: CU3SE2, type code %, sha256 c43a98dbd0136561…

67: PHASE CU3SE2 % 2 3 2 !
68: CONST CU3SE2 : CU : SE : !

Example references (3 of 3; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase; reports values for this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase
doi:10.1139/v75-122 Ritchie MacLaren Murray, Robert Donald Heyding, The Copper–Selenium System at Temperatures to 850 K and Pressures To 50 Kbar, Can. J. Chem. 53, 878-887 (1975).
cited as the source of values for this phase

CUSE_ALPHA (Cu–Se)

Id: phase:cu-se:cuse-alpha; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_mp): Cmcm (63) — on-hull MP CuSe at x(SE)=0.5000
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Cu1 Se1 at x(SE)=0.5000
Candidate (sgte_mmc2): CuSe-alpha · hP26 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CUSE_ALPHA: CuSe-alpha (klockmannite)
Candidate (tdb_comment): CuSe-alpha · hP26 · P6_3/mmc — CuSe-08Du.tdb: 'Prototype CuSe-alpha (hP26, P6_3/mmc), klockmannite'
Candidate (tdb_comment): CuSe-alpha · hP26 · P6_3/mmc — CuSe-23Liu.tdb: 'Prototype CuSe-alpha (hP26, P6_3/mmc), klockmannite'
Stoichiometry: Cu 0.5000, Se 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 300–328.45 K, x(Se) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:cuse-alpha
tdb: tdb:CuSe-08Du.tdb:CUSE_ALPHA, tdb:CuSe-23Liu.tdb:CUSE_ALPHA

TDB models of CUSE_ALPHA (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CUSE_ALPHA, type code %, sha256 47155ae6b8c026d3…

68: PHASE CUSE_ALPHA % 2 1 1 !
69: CONST CUSE_ALPHA : CU : SE : !

CuSe-23Liu.tdb: CUSE_ALPHA, type code %, sha256 c43a98dbd0136561…

72: PHASE CUSE_ALPHA % 2 1 1 !
73: CONST CUSE_ALPHA : CU : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CUSE_B18 (Cu–Se)

Id: phase:cu-se:cuse-b18; status assigned
Structure: CuS · B18 · hP12 · P6_3/mmc (194); type st:b18-cus-hp12; tier A: standard phase name; confidence high
Stoichiometry: Cu 0.5000, Se 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 409.15–652.72 K, x(Se) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:cuse-b18
tdb: tdb:CuSe-08Du.tdb:CUSE_B18, tdb:CuSe-23Liu.tdb:CUSE_B18

TDB models of CUSE_B18 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CUSE_B18, type code %, sha256 47155ae6b8c026d3…

78: PHASE CUSE_B18 % 2 1 1 !
79: CONST CUSE_B18 : CU : SE : !

CuSe-23Liu.tdb: CUSE_B18, type code %, sha256 c43a98dbd0136561…

82: PHASE CUSE_B18 % 2 1 1 !
83: CONST CUSE_B18 : CU : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CUSE_BETA (Cu–Se)

Id: phase:cu-se:cuse-beta; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (dft_mp): Cmcm (63) — on-hull MP CuSe at x(SE)=0.5000
Candidate (dft_oqmd): Cmcm (63) — on-hull OQMD Cu1 Se1 at x(SE)=0.5000
Candidate (sgte_mmc2): CuS (alpha?) · oC24 · Cmcm (63) — Hallstedt 2025 mmc2 row for CUSE_BETA: CuSe-beta
Candidate (tdb_comment): CuS · oC24 · Cmcm, 63 — CuSe-08Du.tdb: 'Prototype CuS (oC24, Cmcm, 63)'
Candidate (tdb_comment): CuS · oC24 · Cmcm — CuSe-23Liu.tdb: 'Prototype CuS (oC24, Cmcm)'
Stoichiometry: Cu 0.5000, Se 0.5000
Stability: stable in 2 of 2 calculated diagram(s): 326.81–410.42 K, x(Se) 0.5–0.5
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:cuse-beta
tdb: tdb:CuSe-08Du.tdb:CUSE_BETA, tdb:CuSe-23Liu.tdb:CUSE_BETA

TDB models of CUSE_BETA (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CUSE_BETA, type code %, sha256 47155ae6b8c026d3…

73: PHASE CUSE_BETA % 2 1 1 !
74: CONST CUSE_BETA : CU : SE : !

CuSe-23Liu.tdb: CUSE_BETA, type code %, sha256 c43a98dbd0136561…

77: PHASE CUSE_BETA % 2 1 1 !
78: CONST CUSE_BETA : CU : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

CUSE2_C18 (Cu–Se)

Id: phase:cu-se:cuse2-c18; status assigned
Structure: alpha-FeS2 · C18 · oP6 · Pnnm (58); type st:c18-alpha-fes2-op6; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaacyy and oqmd-1660, space group 58
Stoichiometry: Cu 0.3333, Se 0.6667
Stability: stable in 2 of 2 calculated diagram(s): 300–610.5 K, x(Se) 0.66667–0.66667
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cu-se:cuse2-c18
mp: mp:mp-aaaaacyy
oqmd: oqmd:oqmd-1660
tdb: tdb:CuSe-08Du.tdb:CUSE2_C18, tdb:CuSe-23Liu.tdb:CUSE2_C18

TDB models of CUSE2_C18 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: CUSE2_C18, type code %, sha256 47155ae6b8c026d3…

83: PHASE CUSE2_C18 % 2 1 2 !
84: CONST CUSE2_C18 : CU : SE : !

CuSe-23Liu.tdb: CUSE2_C18, type code %, sha256 c43a98dbd0136561…

87: PHASE CUSE2_C18 % 2 1 2 !
88: CONST CUSE2_C18 : CU : SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

FCC_A1 (Cu–Se)

Id: phase:cu-se:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stoichiometry: Cu 1.0000
Stability: stable in 2 of 2 calculated diagram(s): 300–1357.77 K, x(Se) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:fcc-a1
tdb: tdb:CuSe-08Du.tdb:FCC_A1, tdb:CuSe-23Liu.tdb:FCC_A1

TDB models of FCC_A1 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: FCC_A1, type code %A, sha256 47155ae6b8c026d3…

33: PHASE FCC_A1 %A 2 1 1 !
34: CONST FCC_A1 : CU : VA : !

CuSe-23Liu.tdb: FCC_A1, type code %A, sha256 c43a98dbd0136561…

37: PHASE FCC_A1 %A 2 1 1 !
38: CONST FCC_A1 : CU : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

HCP_A3 (Cu–Se)

Id: phase:cu-se:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stoichiometry: Cu 1.0000
Stability: not stable in 2 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:hcp-a3
tdb: tdb:CuSe-08Du.tdb:HCP_A3, tdb:CuSe-23Liu.tdb:HCP_A3

TDB models of HCP_A3 (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: HCP_A3, type code %A, sha256 47155ae6b8c026d3…

43: PHASE HCP_A3 %A 2 1 0.5 !
44: CONST HCP_A3 : CU : VA : !

CuSe-23Liu.tdb: HCP_A3, type code %A, sha256 c43a98dbd0136561…

47: PHASE HCP_A3 %A 2 1 0.5 !
48: CONST HCP_A3 : CU : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

LIQUID (Cu–Se)

Id: phase:cu-se:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 494–2500 K, x(Se) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-se:liquid
tdb: tdb:CuSe-08Du.tdb:LIQUID, tdb:CuSe-23Liu.tdb:LIQUID

TDB models of LIQUID (2): PHASE and CONSTITUENT statements as written

CuSe-08Du.tdb: LIQUID, type code %, sha256 47155ae6b8c026d3…

28: PHASE LIQUID:L % 1 1 !
29: CONST LIQUID:L : CU CU2SE SE : !

CuSe-23Liu.tdb: LIQUID, type code %, sha256 c43a98dbd0136561…

32: PHASE LIQUID:L % 1 1 !
33: CONST LIQUID:L : CU CU2SE SE : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-023-01074-8 Runlin Liu, Jiong Wang, Dongyu Cui, Thermodynamic Modeling of the Cu-Sb-Se System, J. Phase Equilib. Diffus. 44, 687-703 (2023).
assessment that models this phase
doi:10.3139/146.101636 Z. Du, C. Guo, M. Tao, C. Li, Int. J. Mater. Res., 99, 294-300(2008).
assessment that models this phase

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Registry: phase registry of binary systems (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735970
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 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); the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work). 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_phase_registry_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Registry: phase registry of binary systems}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735970},
  url       = {https://doi.org/10.5281/zenodo.23735970},
  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}
}