Cu–Zn phases

11 phases (tier A 7, tier C 2, liquid 1, gas 1); 11 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–Zn system page · Markdown · field reference

Phases of the Cu–Zn system (11)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cu-zn:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 650–1174.59 K, x(Zn) 0.35076–0.773	51	11
B2_BCC phase:cu-zn:bcc-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–1175.3 K, x(Zn) 0.35076–0.773	0	5
CU5ZN8_D82 phase:cu-zn:cu5zn8-d82	Cu5Zn8 · D8_2 · cI52 · I-43m (217)	tier A: standard phase name	stable in 5 of 5 calculated diagram(s): 300–1110.03 K, x(Zn) 0.54747–0.70684	33	5
CUZN_B2 phase:cu-zn:cuzn-b2	CsCl · B2 · cP2 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–735.89 K, x(Zn) 0.42026–0.50073	0	1
CUZN3 phase:cu-zn:cuzn3	CuZn3 · hP3 · P-6 (174)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 832.96–973.57 K, x(Zn) 0.71775–0.767	0	1
GAMMA_D82 phase:cu-zn:d82-gamma	Cu5Zn8 · D8_2 · cI52 · I-43m (217)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1105.86 K, x(Zn) 0.57443–0.7001	0	1
FCC_A1 phase:cu-zn:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–1420.27 K, x(Zn) 0–0.39493	11	6
GAS phase:cu-zn:gas	gas	gas	stable in 2 of 2 calculated diagram(s): 1175–2500 K, x(Zn) 0.8225–1	0	2
HCP_A3 phase:cu-zn:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 6 of 6 calculated diagram(s): 300–698.32 K, x(Zn) 0.97335–1	11	6
HCP_IM_A3 phase:cu-zn:hcp-a3-im	Mg · A3 · hP2 · P6_3/mmc (194)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 6 of 6 calculated diagram(s): 300–874.39 K, x(Zn) 0.77284–0.87489	30	6
LIQUID phase:cu-zn:liquid	liquid	liquid	stable in 6 of 6 calculated diagram(s): 692.27–2500 K, x(Zn) 0–1	55	6

BCC_A2 (Cu–Zn)

Id: phase:cu-zn:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 650–1174.59 K, x(Zn) 0.35076–0.773
Literature: 51 values (51 accepted) from 5 papers
Interactive: phase registry entry

Names (23): corpus: corpus:phase:cu-zn:bcc-a2
paper: paper:10.1007/bf02671961:β, paper:10.1007/bf02671961:δ, paper:10.1016/j.calphad.2011.02.001:β, paper:10.1016/j.calphad.2011.02.001:δ, paper:10.1361/105497103770330541:β, paper:10.1361/105497103770330541:δ, paper:10.1557/jmr.2008.0035:β, paper:10.1557/jmr.2008.0035:δ, paper:sha256-85fd53a1a176b694:bcc-A2
system_alias: system_alias:cu-zn:beta, system_alias:cu-zn:delta
tdb: tdb:CuZn-03Dav.tdb:A2_BCC, tdb:CuZn-03Dav.tdb:BCC_A2, tdb:CuZn-05Jia.tdb:A2_BCC, tdb:CuZn-05Jia.tdb:BCC_A2, tdb:CuZn-08Gie.tdb:BCC_A2, tdb:CuZn-11Wan.tdb:A2_BCC, tdb:CuZn-11Wan.tdb:BCC_A2, tdb:CuZn-15Lia.tdb:A2_BCC, tdb:CuZn-15Lia.tdb:BCC_A2, tdb:CuZn-93Kow-LB.tdb:A2_BCC, tdb:CuZn-93Kow-LB.tdb:BCC_A2

TDB models of BCC_A2 (11): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: A2_BCC, type code %B, sha256 4fa0e63708a02b1f…

38: PHASE A2_BCC %B 2 1 3 !
39: CONST A2_BCC : CU ZN : VA : !

CuZn-03Dav.tdb: BCC_A2, type code %B, sha256 4fa0e63708a02b1f…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : CU ZN : VA : !

CuZn-05Jia.tdb: A2_BCC, type code %B, sha256 00e6afc14ff2edb6…

38: PHASE A2_BCC %B 2 1 3 !
39: CONST A2_BCC : CU ZN : VA : !

CuZn-05Jia.tdb: BCC_A2, type code %B, sha256 00e6afc14ff2edb6…

33: PHASE BCC_A2 %B 2 1 3 !
34: CONST BCC_A2 : CU ZN : VA : !

CuZn-08Gie.tdb: BCC_A2, type code %B, sha256 6a3bb3f347ded5af…

32: PHASE BCC_A2 %B 2 1 3 !
33: CONST BCC_A2 : CU ZN : VA : !

CuZn-11Wan.tdb: A2_BCC, type code %B, sha256 1bc8b8df311a816d…

54: PHASE A2_BCC %B 2 1 3 !
55: CONST A2_BCC : CU ZN VA : VA : !

CuZn-11Wan.tdb: BCC_A2, type code %B, sha256 1bc8b8df311a816d…

49: PHASE BCC_A2 %B 2 1 3 !
50: CONST BCC_A2 : CU ZN : VA : !

CuZn-15Lia.tdb: A2_BCC, type code %B, sha256 0e2862d7621854ca…

39: PHASE A2_BCC %B 2 1 3 !
40: CONST A2_BCC : CU ZN : VA : !

CuZn-15Lia.tdb: BCC_A2, type code %B, sha256 0e2862d7621854ca…

34: PHASE BCC_A2 %B 2 1 3 !
35: CONST BCC_A2 : CU ZN : VA : !

CuZn-93Kow-LB.tdb: A2_BCC, type code %B, sha256 199a279ec633d57b…

40: PHASE A2_BCC %B 2 1 3 !
41: CONST A2_BCC : CU ZN : VA : !

CuZn-93Kow-LB.tdb: BCC_A2, type code %B, sha256 199a279ec633d57b…

35: PHASE BCC_A2 %B 2 1 3 !
36: CONST BCC_A2 : CU ZN : VA : !

Example references (6 of 6; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for this phase

B2_BCC (Cu–Zn)

Id: phase:cu-zn:bcc-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Caveat: CuZn-03Dav.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CuZn-05Jia.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CuZn-11Wan.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CuZn-15Lia.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: CuZn-93Kow-LB.tdb: ordered phase with disordered part A2_BCC (order/disorder model)
Caveat: partitioned order/disorder model in CuZn-03Dav.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-05Jia.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-11Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-15Lia.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-93Kow-LB.tdb also describes the disordered state
Stability: stable in 5 of 5 calculated diagram(s): 300–1175.3 K, x(Zn) 0.35076–0.773
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-zn:bcc-b2, corpus:phase:cu-zn:b2-bcc
tdb: tdb:CuZn-03Dav.tdb:B2_BCC, tdb:CuZn-05Jia.tdb:B2_BCC, tdb:CuZn-11Wan.tdb:B2_BCC, tdb:CuZn-15Lia.tdb:B2_BCC, tdb:CuZn-93Kow-LB.tdb:B2_BCC

TDB models of B2_BCC (5): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: B2_BCC, type code %BO, sha256 4fa0e63708a02b1f…

43: PHASE B2_BCC %BO 3 0.5 0.5 3 !
44: CONST B2_BCC : CU% ZN : CU ZN% : VA : !

CuZn-05Jia.tdb: B2_BCC, type code %BO, sha256 00e6afc14ff2edb6…

43: PHASE B2_BCC %BO 3 0.5 0.5 3 !
44: CONST B2_BCC : CU% ZN : CU ZN% : VA : !

CuZn-11Wan.tdb: B2_BCC, type code %BO, sha256 1bc8b8df311a816d…

59: PHASE B2_BCC %BO 3 0.5 0.5 3 !
60: CONST B2_BCC : CU% ZN VA : CU ZN% VA : VA : !

CuZn-15Lia.tdb: B2_BCC, type code %BO, sha256 0e2862d7621854ca…

44: PHASE B2_BCC %BO 3 0.5 0.5 3 !
45: CONST B2_BCC : CU% ZN : CU ZN% : VA : !

CuZn-93Kow-LB.tdb: B2_BCC, type code %BO, sha256 199a279ec633d57b…

45: PHASE B2_BCC %BO 3 0.5 0.5 3 !
46: CONST B2_BCC : CU% ZN : CU ZN% : VA : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase

CU5ZN8_D82 (Cu–Zn)

Id: phase:cu-zn:cu5zn8-d82; status assigned
Structure: Cu5Zn8 · D8_2 · cI52 · I-43m (217); type st:d8-2-cu5zn8-ci52; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CuZn-03Dav.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-08Gie.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-11Wan.tdb also describes the disordered state
Caveat: partitioned order/disorder model in CuZn-93Kow-LB.tdb also describes the disordered state
Stability: stable in 5 of 5 calculated diagram(s): 300–1110.03 K, x(Zn) 0.54747–0.70684
Literature: 33 values (33 accepted) from 5 papers
Interactive: phase registry entry

Names (12): corpus: corpus:phase:cu-zn:cu5zn8-d82
paper: paper:10.1007/bf02671961:γ, paper:10.1016/j.calphad.2011.02.001:γ, paper:10.1361/105497103770330541:γ, paper:10.1557/jmr.2008.0035:γ, paper:sha256-85fd53a1a176b694:CuZn-γ
system_alias: system_alias:cu-zn:gamma
tdb: tdb:CuZn-03Dav.tdb:CU5ZN8_D82, tdb:CuZn-05Jia.tdb:CU5ZN8_D82, tdb:CuZn-08Gie.tdb:CU5ZN8_D82, tdb:CuZn-11Wan.tdb:CU5ZN8_D82, tdb:CuZn-93Kow-LB.tdb:CU5ZN8_D82

TDB models of CU5ZN8_D82 (5): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: CU5ZN8_D82, type code %, sha256 4fa0e63708a02b1f…

58: PHASE CU5ZN8_D82 % 4 2 2 3 6 !
59: CONST CU5ZN8_D82 : CU% ZN : CU ZN% : CU : ZN : !

CuZn-05Jia.tdb: CU5ZN8_D82, type code %, sha256 00e6afc14ff2edb6…

58: PHASE CU5ZN8_D82 % 1 1 !
59: CONST CU5ZN8_D82 : CU% ZN : !

CuZn-08Gie.tdb: CU5ZN8_D82, type code %, sha256 6a3bb3f347ded5af…

52: PHASE CU5ZN8_D82 % 4 2 2 3 6 !
53: CONST CU5ZN8_D82 : CU% ZN : CU ZN% : CU : ZN : !

CuZn-11Wan.tdb: CU5ZN8_D82, type code %, sha256 1bc8b8df311a816d…

74: PHASE CU5ZN8_D82 % 3 4 1 8 !
75: CONST CU5ZN8_D82 : ZN : CU ZN : CU ZN : !

CuZn-93Kow-LB.tdb: CU5ZN8_D82, type code %, sha256 199a279ec633d57b…

60: PHASE CU5ZN8_D82 % 4 2 2 3 6 !
61: CONST CU5ZN8_D82 : CU% ZN : CU ZN% : CU : ZN : !

Example references (5 of 5; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for this phase

CUZN_B2 (Cu–Zn)

Id: phase:cu-zn:cuzn-b2; status assigned
Structure: CsCl · B2 · cP2 · Pm-3m (221); type st:b2-cscl-cp2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 300–735.89 K, x(Zn) 0.42026–0.50073
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cu-zn:cuzn-b2
tdb: tdb:CuZn-08Gie.tdb:CUZN_B2

TDB models of CUZN_B2 (1): PHASE and CONSTITUENT statements as written

CuZn-08Gie.tdb: CUZN_B2, type code %B, sha256 6a3bb3f347ded5af…

47: PHASE CUZN_B2 %B 1 1 !
48: CONST CUZN_B2 : CU ZN : !

CUZN3 (Cu–Zn)

Id: phase:cu-zn:cuzn3; status assigned
Structure: CuZn3 · hP3 · P-6 (174); type st:cuzn3-hp3; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (no_structure_token, off_stoichiometric_model); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 1 of 1 calculated diagram(s): 832.96–973.57 K, x(Zn) 0.71775–0.767
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-zn:cuzn3
system_alias: system_alias:cu-zn:delta
tdb: tdb:CuZn-15Lia.tdb:CUZN3

TDB models of CUZN3 (1): PHASE and CONSTITUENT statements as written

CuZn-15Lia.tdb: CUZN3, type code %, sha256 0e2862d7621854ca…

64: PHASE CUZN3 % 1 1 !
65: CONST CUZN3 : CU ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase

GAMMA_D82 (Cu–Zn)

Id: phase:cu-zn:d82-gamma; status assigned
Structure: Cu5Zn8 · D8_2 · cI52 · I-43m (217); type st:d8-2-cu5zn8-ci52; tier A: standard phase name; confidence high
Caveat: partitioned order/disorder model in CuZn-15Lia.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–1105.86 K, x(Zn) 0.57443–0.7001
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-zn:d82-gamma
system_alias: system_alias:cu-zn:gamma
tdb: tdb:CuZn-15Lia.tdb:GAMMA_D82

TDB models of GAMMA_D82 (1): PHASE and CONSTITUENT statements as written

CuZn-15Lia.tdb: GAMMA_D82, type code %, sha256 0e2862d7621854ca…

59: PHASE GAMMA_D82 % 3 4 6 16 !
60: CONST GAMMA_D82 : CU : CU ZN : CU ZN : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase

FCC_A1 (Cu–Zn)

Id: phase:cu-zn:fcc-a1; status assigned
Structure: Cu · A1 · cF4 · Fm-3m (225); type st:a1-cu-cf4; tier A: standard phase name; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 300–1420.27 K, x(Zn) 0–0.39493
Literature: 11 values (11 accepted) from 5 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:cu-zn:fcc-a1
paper: paper:10.1007/bf02671961:(Cu), paper:10.1016/j.calphad.2011.02.001:α, paper:10.1361/105497103770330541:α, paper:10.1557/jmr.2008.0035:(Cu), paper:sha256-85fd53a1a176b694:fcc-A1
system_alias: system_alias:cu-zn:alpha
tdb: tdb:CuZn-03Dav.tdb:FCC_A1, tdb:CuZn-05Jia.tdb:FCC_A1, tdb:CuZn-08Gie.tdb:FCC_A1, tdb:CuZn-11Wan.tdb:FCC_A1, tdb:CuZn-15Lia.tdb:FCC_A1, tdb:CuZn-93Kow-LB.tdb:FCC_A1

TDB models of FCC_A1 (6): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: FCC_A1, type code %A, sha256 4fa0e63708a02b1f…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : CU% ZN : VA : !

CuZn-05Jia.tdb: FCC_A1, type code %A, sha256 00e6afc14ff2edb6…

28: PHASE FCC_A1 %A 2 1 1 !
29: CONST FCC_A1 : CU% ZN : VA : !

CuZn-08Gie.tdb: FCC_A1, type code %A, sha256 6a3bb3f347ded5af…

27: PHASE FCC_A1 %A 2 1 1 !
28: CONST FCC_A1 : CU% ZN : VA : !

CuZn-11Wan.tdb: FCC_A1, type code %A, sha256 1bc8b8df311a816d…

44: PHASE FCC_A1 %A 2 1 1 !
45: CONST FCC_A1 : CU% ZN : VA : !

CuZn-15Lia.tdb: FCC_A1, type code %A, sha256 0e2862d7621854ca…

29: PHASE FCC_A1 %A 2 1 1 !
30: CONST FCC_A1 : CU% ZN : VA : !

CuZn-93Kow-LB.tdb: FCC_A1, type code %A, sha256 199a279ec633d57b…

30: PHASE FCC_A1 %A 2 1 1 !
31: CONST FCC_A1 : CU% ZN : VA : !

Example references (6 of 6; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for this phase

GAS (Cu–Zn)

Id: phase:cu-zn:gas; status assigned
Structure: gas; type st:gas; gas; confidence high
Stability: stable in 2 of 2 calculated diagram(s): 1175–2500 K, x(Zn) 0.8225–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-zn:gas
tdb: tdb:CuZn-15Lia.tdb:GAS, tdb:CuZn-93Kow-LB.tdb:GAS

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

CuZn-15Lia.tdb: GAS, type code %, sha256 0e2862d7621854ca…

67: PHASE GAS:G % 1 1 !
68: CONST GAS:G : CU CU2 ZN : !

CuZn-93Kow-LB.tdb: GAS, type code %, sha256 199a279ec633d57b…

63: PHASE GAS:G % 1 1 !
64: CONST GAS:G : CU CU2 ZN : !

Example references (2 of 2; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase

HCP_A3 (Cu–Zn)

Id: phase:cu-zn:hcp-a3; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier A: standard phase name; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 300–698.32 K, x(Zn) 0.97335–1
Literature: 11 values (11 accepted) from 5 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:cu-zn:hcp-a3
paper: paper:10.1007/bf02671961:(Zn), paper:10.1016/j.calphad.2011.02.001:(Zn), paper:10.1361/105497103770330541:η, paper:10.1557/jmr.2008.0035:(Zn), paper:sha256-85fd53a1a176b694:hcp-Zn
system_alias: system_alias:cu-zn:eta
tdb: tdb:CuZn-03Dav.tdb:HCP_A3, tdb:CuZn-05Jia.tdb:HCP_A3, tdb:CuZn-08Gie.tdb:HCP_A3, tdb:CuZn-11Wan.tdb:HCP_A3, tdb:CuZn-15Lia.tdb:HCP_A3, tdb:CuZn-93Kow-LB.tdb:HCP_A3

TDB models of HCP_A3 (6): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: HCP_A3, type code %A, sha256 4fa0e63708a02b1f…

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

CuZn-05Jia.tdb: HCP_A3, type code %A, sha256 00e6afc14ff2edb6…

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

CuZn-08Gie.tdb: HCP_A3, type code %A, sha256 6a3bb3f347ded5af…

37: PHASE HCP_A3 %A 2 1 0.5 !
38: CONST HCP_A3 : CU ZN : VA : !

CuZn-11Wan.tdb: HCP_A3, type code %A, sha256 1bc8b8df311a816d…

64: PHASE HCP_A3 %A 2 1 0.5 !
65: CONST HCP_A3 : CU ZN : VA : !

CuZn-15Lia.tdb: HCP_A3, type code %A, sha256 0e2862d7621854ca…

49: PHASE HCP_A3 %A 2 1 0.5 !
50: CONST HCP_A3 : CU ZN : VA : !

CuZn-93Kow-LB.tdb: HCP_A3, type code %A, sha256 199a279ec633d57b…

50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : CU ZN : VA : !

Example references (6 of 6; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for this phase

HCP_IM_A3 (Cu–Zn)

Id: phase:cu-zn:hcp-a3-im; status assigned
Structure: Mg · A3 · hP2 · P6_3/mmc (194); type st:a3-mg-hp2; tier C: assessor-stated (Hallstedt 2025 crystallographic table); confidence assessor-stated
Structure source: B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, supplementary crystallographic table (mmc2) doi:10.1016/j.calphad.2025.102833
Caveat: not certain from the name or DFT alone (unrecognised_name_tokens:IM); structure as stated in the SGTE crystallographic table for this phase name and system
Stability: stable in 6 of 6 calculated diagram(s): 300–874.39 K, x(Zn) 0.77284–0.87489
Literature: 30 values (30 accepted) from 4 papers
Interactive: phase registry entry

Names (13): corpus: corpus:phase:cu-zn:hcp-a3-im, corpus:phase:cu-zn:hcp-im-a3
paper: paper:10.1007/bf02671961:ε, paper:10.1016/j.calphad.2011.02.001:ϵ, paper:10.1361/105497103770330541:ε, paper:10.1557/jmr.2008.0035:ϵ
system_alias: system_alias:cu-zn:epsilon
tdb: tdb:CuZn-03Dav.tdb:HCP_IM_A3, tdb:CuZn-05Jia.tdb:HCP_IM_A3, tdb:CuZn-08Gie.tdb:HCP_IM_A3, tdb:CuZn-11Wan.tdb:HCP_IM_A3, tdb:CuZn-15Lia.tdb:HCP_IM_A3, tdb:CuZn-93Kow-LB.tdb:HCP_IM_A3

TDB models of HCP_IM_A3 (6): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: HCP_IM_A3, type code %, sha256 4fa0e63708a02b1f…

53: PHASE HCP_IM_A3 % 1 1 !
54: CONST HCP_IM_A3 : CU ZN : !

CuZn-05Jia.tdb: HCP_IM_A3, type code %, sha256 00e6afc14ff2edb6…

53: PHASE HCP_IM_A3 % 1 1 !
54: CONST HCP_IM_A3 : CU ZN : !

CuZn-08Gie.tdb: HCP_IM_A3, type code %, sha256 6a3bb3f347ded5af…

42: PHASE HCP_IM_A3 % 1 1 !
43: CONST HCP_IM_A3 : CU ZN : !

CuZn-11Wan.tdb: HCP_IM_A3, type code %, sha256 1bc8b8df311a816d…

69: PHASE HCP_IM_A3 % 1 1 !
70: CONST HCP_IM_A3 : CU ZN : !

CuZn-15Lia.tdb: HCP_IM_A3, type code %, sha256 0e2862d7621854ca…

54: PHASE HCP_IM_A3 % 1 1 !
55: CONST HCP_IM_A3 : CU ZN : !

CuZn-93Kow-LB.tdb: HCP_IM_A3, type code %, sha256 199a279ec633d57b…

55: PHASE HCP_IM_A3 % 1 1 !
56: CONST HCP_IM_A3 : CU ZN : !

Example references (6 of 6; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for this phase

LIQUID (Cu–Zn)

Id: phase:cu-zn:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 6 of 6 calculated diagram(s): 692.27–2500 K, x(Zn) 0–1
Literature: 55 values (55 accepted) from 5 papers
Interactive: phase registry entry

Names (12): corpus: corpus:phase:cu-zn:liquid
paper: paper:10.1007/bf02671961:L, paper:10.1016/j.calphad.2011.02.001:L, paper:10.1361/105497103770330541:L, paper:10.1557/jmr.2008.0035:L, paper:sha256-85fd53a1a176b694:Liquid
tdb: tdb:CuZn-03Dav.tdb:LIQUID, tdb:CuZn-05Jia.tdb:LIQUID, tdb:CuZn-08Gie.tdb:LIQUID, tdb:CuZn-11Wan.tdb:LIQUID, tdb:CuZn-15Lia.tdb:LIQUID, tdb:CuZn-93Kow-LB.tdb:LIQUID

TDB models of LIQUID (6): PHASE and CONSTITUENT statements as written

CuZn-03Dav.tdb: LIQUID, type code %, sha256 4fa0e63708a02b1f…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : CU ZN : !

CuZn-05Jia.tdb: LIQUID, type code %, sha256 00e6afc14ff2edb6…

23: PHASE LIQUID:L % 1 1 !
24: CONST LIQUID:L : CU ZN : !

CuZn-08Gie.tdb: LIQUID, type code %, sha256 6a3bb3f347ded5af…

22: PHASE LIQUID:L % 1 1 !
23: CONST LIQUID:L : CU ZN : !

CuZn-11Wan.tdb: LIQUID, type code %, sha256 1bc8b8df311a816d…

39: PHASE LIQUID:L % 1 1 !
40: CONST LIQUID:L : CU ZN : !

CuZn-15Lia.tdb: LIQUID, type code %, sha256 0e2862d7621854ca…

24: PHASE LIQUID:L % 1 1 !
25: CONST LIQUID:L : CU ZN : !

CuZn-93Kow-LB.tdb: LIQUID, type code %, sha256 199a279ec633d57b…

25: PHASE LIQUID:L % 1 1 !
26: CONST LIQUID:L : CU ZN : !

Example references (6 of 6; assessments first):

doi:10.1007/BF02671961 M. Kowalski, P.J. Spencer, J. Phase Equilib., 14, 432-38 (1993).
assessment that models this phase; cited as the source of values for this phase; reports values for this phase
doi:10.1016/j.calphad.2011.02.001 Jiong Wang, Honghui Xu, Shunli Shang, Lijun Zhang, Yong Du, Wenqing Zhang et al., Experimental investigation and thermodynamic modeling of the Cu–Si–Zn system with the refined description for the Cu–Zn system, Calphad 35, 191-203 (2011).
assessment that models this phase; reports values for this phase
doi:10.1361/105497103770330541 N. David, J-M. Fiorani, M. Vilasi, J. Hertz, Thermodynamic reevaluation of the Cu-Zn system by electromotive force measurements in the zinc-rich part, JPE 24, 240-248 (2003).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2015.09.010 S.-M. Liang, H.-M. Hsiao, R. Schmid-Fetzer, Calphad, 51, 224-32(2015).
assessment that models this phase
doi:10.1016/j.jpcs.2004.08.039 M. Jiang, C.P. Wang, X.J. Liu, I. Ohnuma, R. Kainuma, G.P. Vassilev, K. Ishida, J. Phys. Chem. Solids, 66, 246-50(2005).
assessment that models this phase
doi:10.1557/jmr.2008.0035 Wojciech Gierlotka, Sinn-wen Chen, Thermodynamic descriptions of the Cu–Zn system, J. Mater. Res. 23, 258-263 (2008).
reports values for 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}
}