Cd–Cu phases

8 phases (tier A 5, tier C 1, liquid 1, needs_review 1); 7 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 · Cd–Cu system page · Markdown · field reference

Phases of the Cd–Cu system (8)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
BCC_A2 phase:cd-cu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
CD10CU3_D811 phase:cd-cu:cd10cu3-d811		needs_review	stable in 1 of 1 calculated diagram(s): 300–673.11 K, x(Cu) 0.23077–0.23077	4	1
CD3CU4 phase:cd-cu:cd3cu4	Cd3Cu4 · cF1124 · F-43m (216)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–821.06 K, x(Cu) 0.57143–0.57143	4	1
CD8CU5_D82 phase:cd-cu:cd8cu5-d82	Cu5Zn8 · D8_2 · cI52 · I-43m (217)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–839.11 K, x(Cu) 0.34166–0.47959	6	1
CDCU2_C14 phase:cd-cu:cdcu2-c14	MgZn2 · C14 · hP12 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–822.48 K, x(Cu) 0.66667–0.66667	4	1
FCC_A1 phase:cd-cu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2499.98 K, x(Cu) 0.97523–1	2	1
HCP_A3 phase:cd-cu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–594.22 K, x(Cu) 0–0.00115	2	1
LIQUID phase:cd-cu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 590.72–2500 K, x(Cu) 0–1	12	1

BCC_A2 (Cd–Cu)

Id: phase:cd-cu:bcc-a2; status assigned
Structure: W · A2 · cI2 · Im-3m (229); type st:a2-w-ci2; tier A: standard phase name; confidence high
Stability: not stable in 1 calculated diagram(s)
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-cu:bcc-a2
tdb: tdb:CdCu-10Che.tdb:BCC_A2

TDB models of BCC_A2 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: BCC_A2, type code %B, sha256 80095fae64d3c1aa…

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

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase

CD10CU3_D811 (Cd–Cu)

Id: phase:cd-cu:cd10cu3-d811; status needs_review
No structure assigned. Why: assessment_declared_blocked_by:stoichiometry_contradicts_D8_11; stoichiometry_contradicts_D8_11:CdCu-10Che.tdb
Candidate (literature_printed): Al5Co2 · hP28 — printed with a label mapped to this phase
Candidate (name_token): Al5Co2 · D8_11 · hP28 · P6_3/mmc (194) — Strukturbericht/word 'D811' in the TDB name
Candidate (sgte_mmc2): Al5Co2 · D8_11 · hP28 · P6_3/mmc (194) — Hallstedt 2025 mmc2 row for CD10CU3_D811: Cd10Cu3
Candidate (tdb_comment): Al5Co2 · hP28 · P6_3/mmc — CdCu-10Che.tdb: 'Prototype Al5Co2 (hP28, P6_3/mmc)'
Stoichiometry: Cd 0.7692, Cu 0.2308
Stability: stable in 1 of 1 calculated diagram(s): 300–673.11 K, x(Cu) 0.23077–0.23077
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:cd10cu3-d811
paper: paper:10.1016/s1003-6326(09)60193-x:Cu3Cd10
tdb: tdb:CdCu-10Che.tdb:CD10CU3_D811

TDB models of CD10CU3_D811 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: CD10CU3_D811, type code %, sha256 80095fae64d3c1aa…

43: PHASE CD10CU3_D811 % 2 10 3 !
44: CONST CD10CU3_D811 : CD : CU : !

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

CD3CU4 (Cd–Cu)

Id: phase:cd-cu:cd3cu4; status assigned
Structure: Cd3Cu4 · cF1124 · F-43m (216); type st:cd3cu4-cf1124; 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: Cd 0.4286, Cu 0.5714
Stability: stable in 1 of 1 calculated diagram(s): 300–821.06 K, x(Cu) 0.57143–0.57143
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:cd3cu4
paper: paper:10.1016/s1003-6326(09)60193-x:Cu4Cd3
tdb: tdb:CdCu-10Che.tdb:CD3CU4

TDB models of CD3CU4 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: CD3CU4, type code %, sha256 80095fae64d3c1aa…

53: PHASE CD3CU4 % 2 3 4 !
54: CONST CD3CU4 : CD : CU : !

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

CD8CU5_D82 (Cd–Cu)

Id: phase:cd-cu:cd8cu5-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 CdCu-10Che.tdb also describes the disordered state
Stability: stable in 1 of 1 calculated diagram(s): 300–839.11 K, x(Cu) 0.34166–0.47959
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:cd8cu5-d82
paper: paper:10.1016/s1003-6326(09)60193-x:Cu5Cd8
tdb: tdb:CdCu-10Che.tdb:CD8CU5_D82

TDB models of CD8CU5_D82 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: CD8CU5_D82, type code %, sha256 80095fae64d3c1aa…

48: PHASE CD8CU5_D82 % 2 8 5 !
49: CONST CD8CU5_D82 : CD% CU : CD CU% : !

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

CDCU2_C14 (Cd–Cu)

Id: phase:cd-cu:cdcu2-c14; status assigned
Structure: MgZn2 · C14 · hP12 · P6_3/mmc (194); type st:c14-mgzn2-hp12; tier A: standard phase name; confidence high
Stoichiometry: Cd 0.3333, Cu 0.6667
Stability: stable in 1 of 1 calculated diagram(s): 300–822.48 K, x(Cu) 0.66667–0.66667
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:cdcu2-c14
paper: paper:10.1016/s1003-6326(09)60193-x:Cu2Cd
tdb: tdb:CdCu-10Che.tdb:CDCU2_C14

TDB models of CDCU2_C14 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: CDCU2_C14, type code %, sha256 80095fae64d3c1aa…

58: PHASE CDCU2_C14 % 2 1 2 !
59: CONST CDCU2_C14 : CD : CU : !

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

FCC_A1 (Cd–Cu)

Id: phase:cd-cu: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 1 of 1 calculated diagram(s): 300–2499.98 K, x(Cu) 0.97523–1
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:fcc-a1
paper: paper:10.1016/s1003-6326(09)60193-x:(Cu)
tdb: tdb:CdCu-10Che.tdb:FCC_A1

TDB models of FCC_A1 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: FCC_A1, type code %A, sha256 80095fae64d3c1aa…

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

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

HCP_A3 (Cd–Cu)

Id: phase:cd-cu: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 1 of 1 calculated diagram(s): 300–594.22 K, x(Cu) 0–0.00115
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:hcp-a3
paper: paper:10.1016/s1003-6326(09)60193-x:(Cd)
tdb: tdb:CdCu-10Che.tdb:HCP_A3

TDB models of HCP_A3 (1): PHASE and CONSTITUENT statements as written

CdCu-10Che.tdb: HCP_A3, type code %A, sha256 80095fae64d3c1aa…

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

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; reports values for this phase

LIQUID (Cd–Cu)

Id: phase:cd-cu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 590.72–2500 K, x(Cu) 0–1
Literature: 12 values (12 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-cu:liquid
paper: paper:10.1016/s1003-6326(09)60193-x:L
tdb: tdb:CdCu-10Che.tdb:LIQUID

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

CdCu-10Che.tdb: LIQUID, type code %, sha256 80095fae64d3c1aa…

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

Example references (1 of 1; assessments first):

doi:10.1016/S1003-6326(09)60193-X X.M. Chen, L.B. Liu, L.G. Zhang, H. Bo, Z.P. Jin, Trans. Nonferrous Met. Soc. China, 20, 649-54(2010).
assessment that models this phase; 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}
}