Cu–La phases

13 phases (tier A 7, tier C 1, liquid 1, needs_review 4); 12 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–La system page · Markdown · field reference

Phases of the Cu–La system (13)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cu-la:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 1134–2499 K, x(La) 1–1	0	3
CU2LA_C32 phase:cu-la:cu2la-c32	AlB2 · C32 · hP3 · P6/mmm (191)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1101.61 K, x(La) 0.33333–0.33333	7	3
CU37LA3_D23 phase:cu-la:cu37la3-d23		needs_review	stable in 2 of 2 calculated diagram(s): 1092.77–1146.62 K, x(La) 0.075–0.075	5	2
CU4LA phase:cu-la:cu4la	Cu4La · tI90 · I-4m2 (119)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 2 of 2 calculated diagram(s): 300–1014.78 K, x(La) 0.2–0.2	4	2
CU5LA_D2D phase:cu-la:cu5la-d2d	CaCu5 · D2_d · hP6 · P6/mmm (191)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1072.48 K, x(La) 0.16667–0.16667	6	3
CU6LA phase:cu-la:cu6la		needs_review	stable in 1 of 1 calculated diagram(s): 300–1175.04 K, x(La) 0.14286–0.14286	1	1
CU6LA_A phase:cu-la:cu6la-a		needs_review	stable in 2 of 2 calculated diagram(s): 300–500.05 K, x(La) 0.14286–0.14286	2	2
CU6LA_B phase:cu-la:cu6la-b		needs_review	stable in 2 of 2 calculated diagram(s): 500–1194.51 K, x(La) 0.14286–0.14286	13	2
CULA_B27 phase:cu-la:cula-b27	FeB · B27 · oP8 · Pnma (62)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–802.21 K, x(La) 0.5–0.5	4	3
DHCP phase:cu-la:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1125 K, x(La) 1–1	0	3
FCC_A1 phase:cu-la:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 3 of 3 calculated diagram(s): 300–1393.06 K, x(La) 0–1	8	3
HCP_A3 phase:cu-la:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 3 calculated diagram(s)	0	3
LIQUID phase:cu-la:liquid	liquid	liquid	stable in 3 of 3 calculated diagram(s): 747.98–2500 K, x(La) 0–1	22	3

BCC_A2 (Cu–La)

Id: phase:cu-la: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 3 of 3 calculated diagram(s): 1134–2499 K, x(La) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:bcc-a2
tdb: tdb:CuLa-12An.tdb:BCC_A2, tdb:CuLa-89Qi.tdb:BCC_A2, tdb:CuLa-99Du.tdb:BCC_A2

TDB models of BCC_A2 (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: BCC_A2, type code %B, sha256 96d6ecf2e7f37b9c…

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

CuLa-89Qi.tdb: BCC_A2, type code %B, sha256 c0ed7e9c7856491b…

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

CuLa-99Du.tdb: BCC_A2, type code %B, sha256 41bc14252d38c854…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase

CU2LA_C32 (Cu–La)

Id: phase:cu-la:cu2la-c32; status assigned
Structure: AlB2 · C32 · hP3 · P6/mmm (191); type st:c32-alb2-hp3; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadax and oqmd-29715, space group 191
Stoichiometry: Cu 0.6667, La 0.3333
Stability: stable in 3 of 3 calculated diagram(s): 300–1101.61 K, x(La) 0.33333–0.33333
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-la:cu2la-c32
mp: mp:mp-aaaaadax
oqmd: oqmd:oqmd-29715
paper: paper:10.1016/s0925-8388(99)00080-8:Cu2La
tdb: tdb:CuLa-12An.tdb:CU2LA_C32, tdb:CuLa-89Qi.tdb:CU2LA_C32, tdb:CuLa-99Du.tdb:CU2LA_C32

TDB models of CU2LA_C32 (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU2LA_C32, type code %, sha256 96d6ecf2e7f37b9c…

74: PHASE CU2LA_C32 % 2 2 1 !
75: CONST CU2LA_C32 : CU : LA : !

CuLa-89Qi.tdb: CU2LA_C32, type code %, sha256 c0ed7e9c7856491b…

59: PHASE CU2LA_C32 % 2 2 1 !
60: CONST CU2LA_C32 : CU : LA : !

CuLa-99Du.tdb: CU2LA_C32, type code %, sha256 41bc14252d38c854…

72: PHASE CU2LA_C32 % 2 2 1 !
73: CONST CU2LA_C32 : CU : LA : !

Example references (5 of 5; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase

CU37LA3_D23 (Cu–La)

Id: phase:cu-la:cu37la3-d23; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_D2_3; stoichiometry_contradicts_D2_3:CuLa-12An.tdb; stoichiometry_contradicts_D2_3:CuLa-99Du.tdb
Candidate (literature_printed): NaZn13 · cF112 — printed with a label mapped to this phase
Candidate (name_token): NaZn13 · D2_3 · cF112 · Fm-3c (226) — Strukturbericht/word 'D23' in the TDB name
Candidate (sgte_mmc2): NaZn13 · D2_3 · cF112 · Fm-3c (226) — Hallstedt 2025 mmc2 row for CU37LA3_D23: Cu37La3 (also Cu13La)
Candidate (tdb_comment): NaZn13 · cF112 · Fm-3c — CuLa-12An.tdb: 'Prototype NaZn13 (cF112, Fm-3c); also Cu13La'
Candidate (tdb_comment): NaZn13 · cF112 · Fm-3c — CuLa-99Du.tdb: 'Prototype NaZn13 (cF112, Fm-3c); also Cu13La'
Stoichiometry: Cu 0.9250, La 0.0750
Stability: stable in 2 of 2 calculated diagram(s): 1092.77–1146.62 K, x(La) 0.075–0.075
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:cu37la3-d23
paper: paper:10.1016/s0925-8388(99)00080-8:Cu37La3
tdb: tdb:CuLa-12An.tdb:CU37LA3_D23, tdb:CuLa-99Du.tdb:CU37LA3_D23

TDB models of CU37LA3_D23 (2): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU37LA3_D23, type code %, sha256 96d6ecf2e7f37b9c…

49: PHASE CU37LA3_D23 % 2 37 3 !
50: CONST CU37LA3_D23 : CU : LA : !

CuLa-99Du.tdb: CU37LA3_D23, type code %, sha256 41bc14252d38c854…

47: PHASE CU37LA3_D23 % 2 37 3 !
48: CONST CU37LA3_D23 : CU : LA : !

Example references (3 of 3; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase

CU4LA (Cu–La)

Id: phase:cu-la:cu4la; status assigned
Structure: Cu4La · tI90 · I-4m2 (119); type st:cu4la-ti90; 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_on_hull_entry_in_both, no_structure_token); structure as stated in the SGTE crystallographic table for this phase name and system
Stoichiometry: Cu 0.8000, La 0.2000
Stability: stable in 2 of 2 calculated diagram(s): 300–1014.78 K, x(La) 0.2–0.2
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:cu4la
paper: paper:10.1016/s0925-8388(99)00080-8:Cu4La
tdb: tdb:CuLa-12An.tdb:CU4LA, tdb:CuLa-99Du.tdb:CU4LA

TDB models of CU4LA (2): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU4LA, type code %, sha256 96d6ecf2e7f37b9c…

69: PHASE CU4LA % 2 4 1 !
70: CONST CU4LA : CU : LA : !

CuLa-99Du.tdb: CU4LA, type code %, sha256 41bc14252d38c854…

67: PHASE CU4LA % 2 4 1 !
68: CONST CU4LA : CU : LA : !

Example references (3 of 3; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase

CU5LA_D2D (Cu–La)

Id: phase:cu-la:cu5la-d2d; status assigned
Structure: CaCu5 · D2_d · hP6 · P6/mmm (191); type st:d2-d-cacu5-hp6; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaadwn and oqmd-18822, space group 191
Stoichiometry: Cu 0.8333, La 0.1667
Stability: stable in 3 of 3 calculated diagram(s): 300–1072.48 K, x(La) 0.16667–0.16667
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-la:cu5la-d2d
mp: mp:mp-aaaaadwn
oqmd: oqmd:oqmd-18822
paper: paper:10.1016/s0925-8388(99)00080-8:Cu5La
tdb: tdb:CuLa-12An.tdb:CU5LA_D2D, tdb:CuLa-89Qi.tdb:CU5LA_D2D, tdb:CuLa-99Du.tdb:CU5LA_D2D

TDB models of CU5LA_D2D (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU5LA_D2D, type code %, sha256 96d6ecf2e7f37b9c…

64: PHASE CU5LA_D2D % 2 5 1 !
65: CONST CU5LA_D2D : CU : LA : !

CuLa-89Qi.tdb: CU5LA_D2D, type code %, sha256 c0ed7e9c7856491b…

54: PHASE CU5LA_D2D % 2 5 1 !
55: CONST CU5LA_D2D : CU : LA : !

CuLa-99Du.tdb: CU5LA_D2D, type code %, sha256 41bc14252d38c854…

62: PHASE CU5LA_D2D % 2 5 1 !
63: CONST CU5LA_D2D : CU : LA : !

Example references (5 of 5; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase

CU6LA (Cu–La)

Id: phase:cu-la:cu6la; status needs_review
No structure assigned. Why: no_structure_token; polymorph_family:other phases of this system have the same composition
Candidate (tdb_comment): Cu6La · mP28 · P2_1/c — CuLa-89Qi.tdb: 'Prototype Cu6La (mP28, P2_1/c), low T'
Stoichiometry: Cu 0.8571, La 0.1429
Stability: stable in 1 of 1 calculated diagram(s): 300–1175.04 K, x(La) 0.14286–0.14286
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cu-la:cu6la
paper: paper:10.1016/s0925-8388(99)00080-8:Cu6La
tdb: tdb:CuLa-89Qi.tdb:CU6LA

TDB models of CU6LA (1): PHASE and CONSTITUENT statements as written

CuLa-89Qi.tdb: CU6LA, type code %, sha256 c0ed7e9c7856491b…

49: PHASE CU6LA % 2 6 1 !
50: CONST CU6LA : CU : LA : !

Example references (5 of 5; assessments first):

doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1007/bf02667340 Shunroku Watanabe, O. J. Kleppa, Thermochemistry of alloys of transition metals: Part IV. Alloys of copper with scandium, yttrium, lanthanum, and lutetium, Metall Trans B 15, 357-368 (1984).
cited as the source of values for this phase
doi:10.1016/0022-5088(86)90092-5 Ferdinand Sommer, Joachim Schott, Bruno Predel, Thermodynamic investigations of Cu-Dy, Cu-Er, Cu-Gd and Cu-La alloys, Journal of the Less Common Metals 125, 175-181 (1986).
cited as the source of values for this phase
doi:10.1016/0022-5088(89)90389-5 F. Sommer, D.K. Choi, H.-G. Krull, Determination of the copper activity of liquid CuLa alloys, Journal of the Less Common Metals 146, 319-325 (1989).
cited as the source of values for this phase
doi:10.1016/s0925-8388(99)00080-8 Zhenmin Du, Yunhua Xu, Weijing Zhang, Thermodynamic assessment of the Cu–La system, Journal of Alloys and Compounds 289, 88-95 (1999).
reports values for this phase

CU6LA_A (Cu–La)

Id: phase:cu-la:cu6la-a; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:A; no_structure_token
Candidate (sgte_mmc2): Cu6La · mP28 · P2_1/c (14) — Hallstedt 2025 mmc2 row for CU6LA_A: Cu6La-alpha
Candidate (tdb_comment): Cu6La · mP28 · P2_1/c — CuLa-12An.tdb: 'Prototype Cu6La (mP28, P2_1/c)'
Candidate (tdb_comment): Cu6La · mP28 · P2_1/c — CuLa-99Du.tdb: 'Prototype Cu6La (mP28, P2_1/c)'
Stoichiometry: Cu 0.8571, La 0.1429
Stability: stable in 2 of 2 calculated diagram(s): 300–500.05 K, x(La) 0.14286–0.14286
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:cu6la-a
paper: paper:10.1016/s0925-8388(99)00080-8:αCu6La
tdb: tdb:CuLa-12An.tdb:CU6LA_A, tdb:CuLa-99Du.tdb:CU6LA_A

TDB models of CU6LA_A (2): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU6LA_A, type code %, sha256 96d6ecf2e7f37b9c…

54: PHASE CU6LA_A % 2 6 1 !
55: CONST CU6LA_A : CU : LA : !

CuLa-99Du.tdb: CU6LA_A, type code %, sha256 41bc14252d38c854…

52: PHASE CU6LA_A % 2 6 1 !
53: CONST CU6LA_A : CU : LA : !

Example references (3 of 3; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1143/jpsj.56.3553 Kazuyoshi Yamada, Ichiro Hirosawa, Yasuhisa Noda, Yasuo Endoh, Yoshichika Ōnuki, Takemi Komatsubara, Neutron Scattering Studies on Structural Phase Transition in CeCu6and LaCu6, J. Phys. Soc. Jpn. 56, 3553-3557 (1987).
cited as the source of values for this phase

CU6LA_B (Cu–La)

Id: phase:cu-la:cu6la-b; status needs_review
No structure assigned. Why: name_has_descriptive_tokens:B; no_structure_token
Candidate (sgte_mmc2): CeCu6 · oP28 · Pnma (62) — Hallstedt 2025 mmc2 row for CU6LA_B: Cu6La-beta
Candidate (tdb_comment): CeCu6 · oP28 · Pnma — CuLa-12An.tdb: 'Prototype CeCu6 (oP28, Pnma)'
Candidate (tdb_comment): CeCu6 · oP28 · Pnma — CuLa-99Du.tdb: 'Prototype CeCu6 (oP28, Pnma)'
Stoichiometry: Cu 0.8571, La 0.1429
Stability: stable in 2 of 2 calculated diagram(s): 500–1194.51 K, x(La) 0.14286–0.14286
Literature: 13 values (13 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cu-la:cu6la-b
paper: paper:10.1016/s0925-8388(99)00080-8:Cu6La, paper:10.1016/s0925-8388(99)00080-8:βCu6La
tdb: tdb:CuLa-12An.tdb:CU6LA_B, tdb:CuLa-99Du.tdb:CU6LA_B

TDB models of CU6LA_B (2): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CU6LA_B, type code %, sha256 96d6ecf2e7f37b9c…

59: PHASE CU6LA_B % 2 6 1 !
60: CONST CU6LA_B : CU : LA : !

CuLa-99Du.tdb: CU6LA_B, type code %, sha256 41bc14252d38c854…

57: PHASE CU6LA_B % 2 6 1 !
58: CONST CU6LA_B : CU : LA : !

Example references (5 of 5; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase
doi:10.1143/jpsj.56.3553 Kazuyoshi Yamada, Ichiro Hirosawa, Yasuhisa Noda, Yasuo Endoh, Yoshichika Ōnuki, Takemi Komatsubara, Neutron Scattering Studies on Structural Phase Transition in CeCu6and LaCu6, J. Phys. Soc. Jpn. 56, 3553-3557 (1987).
cited as the source of values for this phase

CULA_B27 (Cu–La)

Id: phase:cu-la:cula-b27; status assigned
Structure: FeB · B27 · oP8 · Pnma (62); type st:b27-feb-op8; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaacjkay and oqmd-29712, space group 62
Stoichiometry: Cu 0.5000, La 0.5000
Stability: stable in 3 of 3 calculated diagram(s): 300–802.21 K, x(La) 0.5–0.5
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (7): corpus: corpus:phase:cu-la:cula-b27
mp: mp:mp-aaacjkay
oqmd: oqmd:oqmd-29712
paper: paper:10.1016/s0925-8388(99)00080-8:CuLa
tdb: tdb:CuLa-12An.tdb:CULA_B27, tdb:CuLa-89Qi.tdb:CULA_B27, tdb:CuLa-99Du.tdb:CULA_B27

TDB models of CULA_B27 (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: CULA_B27, type code %, sha256 96d6ecf2e7f37b9c…

79: PHASE CULA_B27 % 2 1 1 !
80: CONST CULA_B27 : CU : LA : !

CuLa-89Qi.tdb: CULA_B27, type code %, sha256 c0ed7e9c7856491b…

64: PHASE CULA_B27 % 2 1 1 !
65: CONST CULA_B27 : CU : LA : !

CuLa-99Du.tdb: CULA_B27, type code %, sha256 41bc14252d38c854…

77: PHASE CULA_B27 % 2 1 1 !
78: CONST CULA_B27 : CU : LA : !

Example references (4 of 4; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase

DHCP (Cu–La)

Id: phase:cu-la:dhcp-a3; status assigned
Structure: alpha-La · A3' · hP4 · P6_3/mmc (194); type st:a3-alpha-la-hp4; tier A: standard phase name; confidence high
Stoichiometry: La 1.0000
Stability: stable in 3 of 3 calculated diagram(s): 300–1125 K, x(La) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:dhcp-a3
tdb: tdb:CuLa-12An.tdb:DHCP, tdb:CuLa-89Qi.tdb:DHCP, tdb:CuLa-99Du.tdb:DHCP

TDB models of DHCP (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: DHCP, type code %, sha256 96d6ecf2e7f37b9c…

44: PHASE DHCP % 1 1 !
45: CONST DHCP : LA : !

CuLa-89Qi.tdb: DHCP, type code %, sha256 c0ed7e9c7856491b…

43: PHASE DHCP % 1 1 !
44: CONST DHCP : LA : !

CuLa-99Du.tdb: DHCP, type code %, sha256 41bc14252d38c854…

42: PHASE DHCP % 1 1 !
43: CONST DHCP : LA : !

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase

FCC_A1 (Cu–La)

Id: phase:cu-la: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 3 of 3 calculated diagram(s): 300–1393.06 K, x(La) 0–1
Literature: 8 values (8 accepted) from 1 papers
Interactive: phase registry entry

Names (6): corpus: corpus:phase:cu-la:fcc-a1
paper: paper:10.1016/s0925-8388(99)00080-8:f.c.c.(Cu), paper:10.1016/s0925-8388(99)00080-8:f.c.c.(La)
tdb: tdb:CuLa-12An.tdb:FCC_A1, tdb:CuLa-89Qi.tdb:FCC_A1, tdb:CuLa-99Du.tdb:FCC_A1

TDB models of FCC_A1 (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: FCC_A1, type code %A, sha256 96d6ecf2e7f37b9c…

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

CuLa-89Qi.tdb: FCC_A1, type code %A, sha256 c0ed7e9c7856491b…

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

CuLa-99Du.tdb: FCC_A1, type code %A, sha256 41bc14252d38c854…

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

Example references (5 of 5; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of values for this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase

HCP_A3 (Cu–La)

Id: phase:cu-la: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 3 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:cu-la:hcp-a3
tdb: tdb:CuLa-12An.tdb:HCP_A3, tdb:CuLa-89Qi.tdb:HCP_A3, tdb:CuLa-99Du.tdb:HCP_A3

TDB models of HCP_A3 (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: HCP_A3, type code %A, sha256 96d6ecf2e7f37b9c…

39: PHASE HCP_A3 %A 2 1 0.5 !
40: CONST HCP_A3 : CU : VA : !

CuLa-89Qi.tdb: HCP_A3, type code %A, sha256 c0ed7e9c7856491b…

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

CuLa-99Du.tdb: HCP_A3, type code %A, sha256 41bc14252d38c854…

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

Example references (3 of 3; assessments first):

doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase

LIQUID (Cu–La)

Id: phase:cu-la:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 3 of 3 calculated diagram(s): 747.98–2500 K, x(La) 0–1
Literature: 22 values (22 accepted) from 1 papers
Interactive: phase registry entry

Names (5): corpus: corpus:phase:cu-la:liquid
paper: paper:10.1016/s0925-8388(99)00080-8:L
tdb: tdb:CuLa-12An.tdb:LIQUID, tdb:CuLa-89Qi.tdb:LIQUID, tdb:CuLa-99Du.tdb:LIQUID

TDB models of LIQUID (3): PHASE and CONSTITUENT statements as written

CuLa-12An.tdb: LIQUID, type code %, sha256 96d6ecf2e7f37b9c…

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

CuLa-89Qi.tdb: LIQUID, type code %, sha256 c0ed7e9c7856491b…

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

CuLa-99Du.tdb: LIQUID, type code %, sha256 41bc14252d38c854…

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

Example references (5 of 5; assessments first):

doi:10.1016/S0925-8388(99)00080-8 Z. Du, Y. Xu, W. Zhang, J. Alloys Compd., 289, 88-95(1999).
assessment that models this phase; reports values for this phase
doi:10.1016/j.calphad.2011.10.004 Xuehui An, Qian Li, Jieyu Zhang, Shuanglin Chen, Ying Yang, Phase equilibria of the La–Ni–Cu ternary system at 673 K: Thermodynamic modeling and experimental validation, Calphad 36, 8-15 (2012).
assessment that models this phase
doi:10.1515/ijmr-1989-801206 G. Qi, K. Itagaki, S. an Mey, P.J. Spencer, Z. Metallkd., 80, 883-87(1989).
assessment that models this phase
doi:10.1016/0022-5088(77)90104-7 S. Cirafici, A. Palenzona, The lanthanum-copper system, Journal of the Less Common Metals 53, 199-203 (1977).
cited as the source of values for this phase
doi:10.1016/0022-5088(85)90308-x F. Meyer-Liautaud, C.H. Allibert, J.M. Moreau, New phases in the system LaCu, Journal of the Less Common Metals 110, 81-90 (1985).
cited as the source of 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}
}