Be–Pu phases

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

Phases of the Be–Pu system (9)
Phase	Structure	Basis	Stability (calculated)	TDB models
TETRAGONAL_A6 phase:be-pu:a6-tetragonal	In · A6 · tI2 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 612.41–908.17 K, x(Pu) 1–1	1
BCC_A2 phase:be-pu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 743.17–1563.98 K, x(Pu) 0–1	1
BE13PU_D23 phase:be-pu:be13pu-d23	NaZn13 · D2_3 · cF112 · Fm-3c (226)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–2218.48 K, x(Pu) 0.07143–0.07143	1
FCC_A1 phase:be-pu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 593.06–737.41 K, x(Pu) 0.99998–1	1
HCP_A3 phase:be-pu:hcp-a3	Mg · A3 · hP2 · P6_3/mmc (194)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1538 K, x(Pu) 0–0	1
LIQUID phase:be-pu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 902.44–4000 K, x(Pu) 0–1	1
ALPHA_PU phase:be-pu:pu-alpha		needs_review	stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1	1
BETA_PU phase:be-pu:pu-beta		needs_review	stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1	1
GAMMA_PU phase:be-pu:pu-gamma		needs_review	stable in 1 of 1 calculated diagram(s): 487.9–608.06 K, x(Pu) 1–1	1

TETRAGONAL_A6 (Be–Pu)

Id: phase:be-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): 612.41–908.17 K, x(Pu) 1–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

BePu-16Hua.tdb: TETRAGONAL_A6, type code %, sha256 69b3a8a86d81e943…

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 (Be–Pu)

Id: phase:be-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): 743.17–1563.98 K, x(Pu) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

BePu-16Hua.tdb: BCC_A2, type code %B, sha256 69b3a8a86d81e943…

30: PHASE BCC_A2 %B 2 1 3 !
31: CONST BCC_A2 : BE% 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

BE13PU_D23 (Be–Pu)

Id: phase:be-pu:be13pu-d23; status assigned
Structure: NaZn13 · D2_3 · cF112 · Fm-3c (226); type st:d2-3-nazn13-cf112; tier A: standard phase name; confidence high
Caveat: DFT agrees: on-hull mp-aaaaaamz and oqmd-10898, space group 226
Stoichiometry: Be 0.9286, Pu 0.0714
Stability: stable in 1 of 1 calculated diagram(s): 300–2218.48 K, x(Pu) 0.07143–0.07143
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:be-pu:be13pu-d23
mp: mp:mp-aaaaaamz
oqmd: oqmd:oqmd-10898
tdb: tdb:BePu-16Hua.tdb:BE13PU_D23

TDB models of BE13PU_D23 (1): PHASE and CONSTITUENT statements as written

BePu-16Hua.tdb: BE13PU_D23, type code %, sha256 69b3a8a86d81e943…

60: PHASE BE13PU_D23 % 2 13 1 !
61: CONST BE13PU_D23 : BE : 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

FCC_A1 (Be–Pu)

Id: phase:be-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): 593.06–737.41 K, x(Pu) 0.99998–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

BePu-16Hua.tdb: FCC_A1, type code %A, sha256 69b3a8a86d81e943…

25: PHASE FCC_A1 %A 2 1 1 !
26: CONST FCC_A1 : BE 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 (Be–Pu)

Id: phase:be-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: Be 1.0000
Stability: stable in 1 of 1 calculated diagram(s): 300–1538 K, x(Pu) 0–0
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

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

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

BePu-16Hua.tdb: HCP_A3, type code %A, sha256 69b3a8a86d81e943…

35: PHASE HCP_A3 %A 2 1 0.5 !
36: CONST HCP_A3 : BE : 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 (Be–Pu)

Id: phase:be-pu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 902.44–4000 K, x(Pu) 0–1
Literature: 0 values (0 accepted) from 0 papers
Interactive: phase registry entry

Names (2): corpus: corpus:phase:be-pu:liquid
tdb: tdb:BePu-16Hua.tdb:LIQUID

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

BePu-16Hua.tdb: LIQUID, type code %, sha256 69b3a8a86d81e943…

20: PHASE LIQUID:L % 1 1 !
21: CONST LIQUID:L : BE 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 (Be–Pu)

Id: phase:be-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 — BePu-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:be-pu:pu-alpha
tdb: tdb:BePu-16Hua.tdb:ALPHA_PU

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

BePu-16Hua.tdb: ALPHA_PU, type code %, sha256 69b3a8a86d81e943…

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 (Be–Pu)

Id: phase:be-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 — BePu-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:be-pu:pu-beta
tdb: tdb:BePu-16Hua.tdb:BETA_PU

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

BePu-16Hua.tdb: BETA_PU, type code %, sha256 69b3a8a86d81e943…

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 (Be–Pu)

Id: phase:be-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 — BePu-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:be-pu:pu-gamma
tdb: tdb:BePu-16Hua.tdb:GAMMA_PU

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

BePu-16Hua.tdb: GAMMA_PU, type code %, sha256 69b3a8a86d81e943…

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}
}