La–Pu phases

9 phases (tier A 5, liquid 1, needs_review 3); 8 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 · La–Pu system page · Markdown · field reference

Phases of the La–Pu system (9)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
TETRAGONAL_A6 phase:la-pu:a6-tetragonal	In · A6 · tI2 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 736.13–760.89 K, x(Pu) 0.99815–1	6	1
BCC_A2 phase:la-pu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 753.89–1240.14 K, x(Pu) 0–1	14	1
DHCP phase:la-pu:dhcp-a3	alpha-La · A3' · hP4 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1134.99 K, x(Pu) 0–0	1	1
FCC_A1 phase:la-pu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 472.48–1134.99 K, x(Pu) 0–1	19	1
HCP_A3 phase:la-pu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	not stable in 1 calculated diagram(s)	0	1
LIQUID phase:la-pu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 912.12–4000 K, x(Pu) 0–1	11	1
ALPHA_PU phase:la-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:la-pu:pu-beta		needs_review	stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1	3	1
GAMMA_PU phase:la-pu:pu-gamma		needs_review	stable in 1 of 1 calculated diagram(s): 487.9–727.04 K, x(Pu) 1–1	5	1

TETRAGONAL_A6 (La–Pu)

Id: phase:la-pu:a6-tetragonal; status assigned
Structure: In · A6 · tI2 · I4/mmm (139); type st:a6-in-ti2; tier A: standard phase name; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 736.13–760.89 K, x(Pu) 0.99815–1
Literature: 6 values (6 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:a6-tetragonal, corpus:phase:la-pu:tetragonal-a6
paper: paper:10.1016/j.jnucmat.2014.07.001:(δ'Pu)
tdb: tdb:LaPu-14Liu.tdb:TETRAGONAL_A6

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

LaPu-14Liu.tdb: TETRAGONAL_A6, type code %, sha256 b876dfcc548ef419…

47: PHASE TETRAGONAL_A6 % 1 1 !
48: CONST TETRAGONAL_A6 : LA PU% : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

BCC_A2 (La–Pu)

Id: phase:la-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): 753.89–1240.14 K, x(Pu) 0–1
Literature: 14 values (14 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:bcc-a2
paper: paper:10.1016/j.jnucmat.2014.07.001:(γLa), paper:10.1016/j.jnucmat.2014.07.001:(εPu)
tdb: tdb:LaPu-14Liu.tdb:BCC_A2

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

LaPu-14Liu.tdb: BCC_A2, type code %B, sha256 b876dfcc548ef419…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

DHCP (La–Pu)

Id: phase:la-pu: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 1 of 1 calculated diagram(s): 300–1134.99 K, x(Pu) 0–0
Literature: 1 values (1 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:dhcp-a3, corpus:phase:la-pu:dhcp
paper: paper:10.1016/j.jnucmat.2014.07.001:(αLa)
tdb: tdb:LaPu-14Liu.tdb:DHCP

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

LaPu-14Liu.tdb: DHCP, type code %, sha256 b876dfcc548ef419…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

FCC_A1 (La–Pu)

Id: phase:la-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): 472.48–1134.99 K, x(Pu) 0–1
Literature: 19 values (19 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:fcc-a1, corpus:phase:la-pu:fcc-a1-2
paper: paper:10.1016/j.jnucmat.2014.07.001:(βLa)
tdb: tdb:LaPu-14Liu.tdb:FCC_A1

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

LaPu-14Liu.tdb: FCC_A1, type code %A, sha256 b876dfcc548ef419…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

HCP_A3 (La–Pu)

Id: phase:la-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: Pu 1.0000
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:la-pu:hcp-a3
tdb: tdb:LaPu-14Liu.tdb:HCP_A3

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

LaPu-14Liu.tdb: HCP_A3, type code %A, sha256 b876dfcc548ef419…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase

LIQUID (La–Pu)

Id: phase:la-pu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 912.12–4000 K, x(Pu) 0–1
Literature: 11 values (11 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:liquid
paper: paper:10.1016/j.jnucmat.2014.07.001:L1, paper:10.1016/j.jnucmat.2014.07.001:L2
tdb: tdb:LaPu-14Liu.tdb:LIQUID

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

LaPu-14Liu.tdb: LIQUID, type code %, sha256 b876dfcc548ef419…

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

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

ALPHA_PU (La–Pu)

Id: phase:la-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 — LaPu-14Liu.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:la-pu:pu-alpha
tdb: tdb:LaPu-14Liu.tdb:ALPHA_PU

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

LaPu-14Liu.tdb: ALPHA_PU, type code %, sha256 b876dfcc548ef419…

52: PHASE ALPHA_PU % 1 1 !
53: CONST ALPHA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase

BETA_PU (La–Pu)

Id: phase:la-pu:pu-beta; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (literature_printed): beta-Pu · mC34 — printed with a label mapped to this phase
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 — LaPu-14Liu.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: 3 values (3 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:pu-beta, corpus:phase:la-pu:beta-pu
paper: paper:10.1016/j.jnucmat.2014.07.001:(βPu)
tdb: tdb:LaPu-14Liu.tdb:BETA_PU

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

LaPu-14Liu.tdb: BETA_PU, type code %, sha256 b876dfcc548ef419…

57: PHASE BETA_PU % 1 1 !
58: CONST BETA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
assessment that models this phase; reports values for this phase

GAMMA_PU (La–Pu)

Id: phase:la-pu:pu-gamma; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (literature_printed): gamma-Pu · oF8 — printed with a label mapped to this phase
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 — LaPu-14Liu.tdb: 'Prototype gamma-Pu (oF8, Fddd)'
Stoichiometry: Pu 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 487.9–727.04 K, x(Pu) 1–1
Literature: 5 values (5 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:la-pu:pu-gamma, corpus:phase:la-pu:gamma-pu
paper: paper:10.1016/j.jnucmat.2014.07.001:(γPu)
tdb: tdb:LaPu-14Liu.tdb:GAMMA_PU

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

LaPu-14Liu.tdb: GAMMA_PU, type code %, sha256 b876dfcc548ef419…

62: PHASE GAMMA_PU % 1 1 !
63: CONST GAMMA_PU : PU : !

Example references (1 of 1; assessments first):

doi:10.1016/j.jnucmat.2014.07.001 X.J. Liu, Q. He, D. Wang, Y. Lu, M.H. Chen, J.P. Jia et al., Thermodynamic assessments of the Pu–Zn and La–Pu systems, Journal of Nuclear Materials 453, 169-175 (2014).
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}
}