Cd–Pu phases

12 phases (tier A 5, liquid 1, needs_review 5, unresolved_no_candidates 1); 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 · Cd–Pu system page · Markdown · field reference

Phases of the Cd–Pu system (12)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
TETRAGONAL_A6 phase:cd-pu:a6-tetragonal	In · A6 · tI2 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 611.56–910.67 K, x(Pu) 1–1	0	1
BCC_A2 phase:cd-pu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 755.67–3999.93 K, x(Pu) 0.99999–1	0	1
CD11PU_D2E phase:cd-pu:cd11pu-d2e	BaHg11 · D2_e · cP36 · Pm-3m (221)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–683.14 K, x(Pu) 0.08333–0.08333	0	1
CD2PU phase:cd-pu:cd2pu		needs_review	stable in 1 of 1 calculated diagram(s): 300–1203.01 K, x(Pu) 0.33333–0.33333	2	1
CD4PU phase:cd-pu:cd4pu		unresolved_no_candidates	stable in 1 of 1 calculated diagram(s): 300–1074.68 K, x(Pu) 0.2–0.2	2	1
CD6PU phase:cd-pu:cd6pu		needs_review	stable in 1 of 1 calculated diagram(s): 300–1003.27 K, x(Pu) 0.14286–0.14286	2	1
FCC_A1 phase:cd-pu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 593.06–910 K, x(Pu) 0.41–1	0	1
HCP_A3 phase:cd-pu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–594.04 K, x(Pu) 0–0	0	1
LIQUID phase:cd-pu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 594.04–4000 K, x(Pu) 0–1	0	1
ALPHA_PU phase:cd-pu:pu-alpha		needs_review	stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1	0	1
BETA_PU phase:cd-pu:pu-beta		needs_review	stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1	0	1
GAMMA_PU phase:cd-pu:pu-gamma		needs_review	stable in 1 of 1 calculated diagram(s): 487.9–608.06 K, x(Pu) 1–1	0	1

TETRAGONAL_A6 (Cd–Pu)

Id: phase:cd-pu:a6-tetragonal; status assigned
Structure: In · A6 · tI2 · I4/mmm (139); type st:a6-in-ti2; tier A: standard phase name; confidence high
Stoichiometry: Pu 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 611.56–910.67 K, x(Pu) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:a6-tetragonal
tdb: tdb:CdPu-16Hua.tdb:TETRAGONAL_A6

TDB models of TETRAGONAL_A6 (1): PHASE and CONSTITUENT statements as written

CdPu-16Hua.tdb: TETRAGONAL_A6, type code %, sha256 b0796d759bc2c895…

40: PHASE TETRAGONAL_A6 % 1 1 !
41: CONST TETRAGONAL_A6 : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

BCC_A2 (Cd–Pu)

Id: phase:cd-pu: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 1 of 1 calculated diagram(s): 755.67–3999.93 K, x(Pu) 0.99999–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:bcc-a2
tdb: tdb:CdPu-16Hua.tdb:BCC_A2

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

CdPu-16Hua.tdb: BCC_A2, type code %B, sha256 b0796d759bc2c895…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : CD PU% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

CD11PU_D2E (Cd–Pu)

Id: phase:cd-pu:cd11pu-d2e; status assigned
Structure: BaHg11 · D2_e · cP36 · Pm-3m (221); type st:d2-e-bahg11-cp36; tier A: standard phase name; confidence high
Stoichiometry: Cd 0.9167, Pu 0.0833
Stability: stable in 1 of 1 calculated diagram(s): 300–683.14 K, x(Pu) 0.08333–0.08333
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:cd11pu-d2e
tdb: tdb:CdPu-16Hua.tdb:CD11PU_D2E

TDB models of CD11PU_D2E (1): PHASE and CONSTITUENT statements as written

CdPu-16Hua.tdb: CD11PU_D2E, type code %, sha256 b0796d759bc2c895…

60: PHASE CD11PU_D2E % 2 11 1 !
61: CONST CD11PU_D2E : CD : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

CD2PU (Cd–Pu)

Id: phase:cd-pu:cd2pu; status needs_review
No structure assigned. Why: no_on_hull_entry_in_mp; no_structure_token; sgte_mmc2_row_incomplete
Candidate (dft_oqmd): P6/mmm (191) — on-hull OQMD Cd2 Pu1 at x(PU)=0.3333
Candidate (sgte_mmc2): (Cd2Pu) — Hallstedt 2025 mmc2 row for CD2PU: Cd2Pu
Stoichiometry: Cd 0.6667, Pu 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1203.01 K, x(Pu) 0.33333–0.33333
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-pu:cd2pu
paper: paper:10.1361/105497101770338707:Cd2Pu
tdb: tdb:CdPu-16Hua.tdb:CD2PU

TDB models of CD2PU (1): PHASE and CONSTITUENT statements as written

CdPu-16Hua.tdb: CD2PU, type code %, sha256 b0796d759bc2c895…

75: PHASE CD2PU % 2 2 1 !
76: CONST CD2PU : CD : PU : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase
doi:10.1361/105497101770338707 Masaki Kurata, Yoshiharu Sakamura, Thermodynamic assessment of systems of actinide or rare earth with Cd, JPE 22, 232-240 (2001).
reports values for this phase

CD4PU (Cd–Pu)

Id: phase:cd-pu:cd4pu; status unresolved_no_candidates
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token
Stoichiometry: Cd 0.8000, Pu 0.2000
Stability: stable in 1 of 1 calculated diagram(s): 300–1074.68 K, x(Pu) 0.2–0.2
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-pu:cd4pu
paper: paper:10.1361/105497101770338707:Cd4Pu
tdb: tdb:CdPu-16Hua.tdb:CD4PU

TDB models of CD4PU (1): PHASE and CONSTITUENT statements as written

CdPu-16Hua.tdb: CD4PU, type code %, sha256 b0796d759bc2c895…

70: PHASE CD4PU % 2 4 1 !
71: CONST CD4PU : CD : PU : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase
doi:10.1361/105497101770338707 Masaki Kurata, Yoshiharu Sakamura, Thermodynamic assessment of systems of actinide or rare earth with Cd, JPE 22, 232-240 (2001).
reports values for this phase

CD6PU (Cd–Pu)

Id: phase:cd-pu:cd6pu; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_rows_disagree
Candidate (sgte_mmc2): (Cd6Pu) — Hallstedt 2025 mmc2 row for CD6PU: Cd6Pu
Candidate (sgte_mmc2): Cd6Y · cI184 · Im-3 (204) — Hallstedt 2025 mmc2 row for CD6PU: Cd6Pu
Candidate (tdb_comment): Cd6Y · cI184 · Im-3 — CdPu-16Hua.tdb: 'Prototype Cd6Y (cI184, Im-3)'
Stoichiometry: Cd 0.8571, Pu 0.1429
Stability: stable in 1 of 1 calculated diagram(s): 300–1003.27 K, x(Pu) 0.14286–0.14286
Literature: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:cd-pu:cd6pu
paper: paper:10.1361/105497101770338707:Cd6Pu
tdb: tdb:CdPu-16Hua.tdb:CD6PU

TDB models of CD6PU (1): PHASE and CONSTITUENT statements as written

CdPu-16Hua.tdb: CD6PU, type code %, sha256 b0796d759bc2c895…

65: PHASE CD6PU % 2 6 1 !
66: CONST CD6PU : CD : PU : !

Example references (2 of 2; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase
doi:10.1361/105497101770338707 Masaki Kurata, Yoshiharu Sakamura, Thermodynamic assessment of systems of actinide or rare earth with Cd, JPE 22, 232-240 (2001).
reports values for this phase

FCC_A1 (Cd–Pu)

Id: phase:cd-pu: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): 593.06–910 K, x(Pu) 0.41–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:fcc-a1
tdb: tdb:CdPu-16Hua.tdb:FCC_A1

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

CdPu-16Hua.tdb: FCC_A1, type code %A, sha256 b0796d759bc2c895…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : CD PU% : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

HCP_A3 (Cd–Pu)

Id: phase:cd-pu: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: Cd 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–594.04 K, x(Pu) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:hcp-a3
tdb: tdb:CdPu-16Hua.tdb:HCP_A3

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

CdPu-16Hua.tdb: HCP_A3, type code %A, sha256 b0796d759bc2c895…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : CD : VA : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

LIQUID (Cd–Pu)

Id: phase:cd-pu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 594.04–4000 K, x(Pu) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:liquid
tdb: tdb:CdPu-16Hua.tdb:LIQUID

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

CdPu-16Hua.tdb: LIQUID, type code %, sha256 b0796d759bc2c895…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : CD PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

ALPHA_PU (Cd–Pu)

Id: phase:cd-pu:pu-alpha; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (sgte_mmc2): alpha-Pu · mP16 · P2_1/m (11) — Hallstedt 2025 mmc2 row for ALPHA_PU: Pu (alpha)
Candidate (tdb_comment): alpha-Pu · mP16 · P2_1/m — CdPu-16Hua.tdb: 'Prototype alpha-Pu (mP16, P2_1/m)'
Stoichiometry: Pu 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:pu-alpha
tdb: tdb:CdPu-16Hua.tdb:ALPHA_PU

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

CdPu-16Hua.tdb: ALPHA_PU, type code %, sha256 b0796d759bc2c895…

45: PHASE ALPHA_PU % 1 1 !
46: CONST ALPHA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

BETA_PU (Cd–Pu)

Id: phase:cd-pu:pu-beta; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (sgte_mmc2): beta-Pu · mC34 · C2/m (12) — Hallstedt 2025 mmc2 row for BETA_PU: Pu (beta)
Candidate (tdb_comment): beta-Pu · mC34 · C2/m — CdPu-16Hua.tdb: 'Prototype beta-Pu (mC34, C2/m)'
Stoichiometry: Pu 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:pu-beta
tdb: tdb:CdPu-16Hua.tdb:BETA_PU

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

CdPu-16Hua.tdb: BETA_PU, type code %, sha256 b0796d759bc2c895…

50: PHASE BETA_PU % 1 1 !
51: CONST BETA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
assessment that models this phase

GAMMA_PU (Cd–Pu)

Id: phase:cd-pu:pu-gamma; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (sgte_mmc2): gamma-Pu · oF8 · Fddd (70) — Hallstedt 2025 mmc2 row for GAMMA_PU: Hg4In, Pu (gamma)
Candidate (tdb_comment): gamma-Pu · oF8 · Fddd — CdPu-16Hua.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
Stoichiometry: Pu 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 487.9–608.06 K, x(Pu) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:cd-pu:pu-gamma
tdb: tdb:CdPu-16Hua.tdb:GAMMA_PU

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

CdPu-16Hua.tdb: GAMMA_PU, type code %, sha256 b0796d759bc2c895…

55: PHASE GAMMA_PU % 1 1 !
56: CONST GAMMA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.calphad.2015.12.004 Y.X. Huang, Y. Lu, Q. He, Y. Wang, W. Fang, X.J. Liu, J.P. Jia, C.P. Wang, Calphad, 52, 120-24(2016).
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}
}