Ag–Pu phases

10 phases (tier A 4, tier C 1, liquid 1, needs_review 4); 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 · Ag–Pu system page · Markdown · field reference

Phases of the Ag–Pu system (10)
Phase	Structure	Basis	Stability (calculated)	Literature values	TDB models
TETRAGONAL_A6 phase:ag-pu:a6-tetragonal	In · A6 · tI2 · I4/mmm (139)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 611.42–910.67 K, x(Pu) 1–1	4	1
AG2PU phase:ag-pu:ag2pu		needs_review	stable in 1 of 1 calculated diagram(s): 300–1092.7 K, x(Pu) 0.33333–0.33333	17	1
AG51PU14 phase:ag-pu:ag51pu14	Ag51Gd14 · hP68 · P6/m (175)	tier C: assessor-stated (Hallstedt 2025 crystallographic table)	stable in 1 of 1 calculated diagram(s): 300–1250 K, x(Pu) 0.21538–0.21538	7	1
BCC_A2 phase:ag-pu:bcc-a2	W · A2 · cI2 · Im-3m (229)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 755.67–3999.25 K, x(Pu) 0.42–1	4	1
FCC_A1 phase:ag-pu:fcc-a1	Cu · A1 · cF4 · Fm-3m (225)	tier A: standard phase name	stable in 1 of 1 calculated diagram(s): 300–1266.15 K, x(Pu) 0–1	4	1
HCP_A3 phase:ag-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:ag-pu:liquid	liquid	liquid	stable in 1 of 1 calculated diagram(s): 909.75–4000 K, x(Pu) 0–1	10	1
ALPHA_PU phase:ag-pu:pu-alpha		needs_review	stable in 1 of 1 calculated diagram(s): 300–397.62 K, x(Pu) 1–1	2	1
BETA_PU phase:ag-pu:pu-beta		needs_review	stable in 1 of 1 calculated diagram(s): 397.62–487.9 K, x(Pu) 1–1	4	1
GAMMA_PU phase:ag-pu:pu-gamma		needs_review	stable in 1 of 1 calculated diagram(s): 487.9–608.06 K, x(Pu) 1–1	4	1

TETRAGONAL_A6 (Ag–Pu)

Id: phase:ag-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): 611.42–910.67 K, x(Pu) 1–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-pu:a6-tetragonal, corpus:phase:ag-pu:tetragonal-a6
paper: paper:10.1007/s11669-020-00813-5:(δ'Pu)
tdb: tdb:AgPu-20Zho.tdb:TETRAGONAL_A6

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

AgPu-20Zho.tdb: TETRAGONAL_A6, type code %, sha256 3a0aa8760514e86a…

55: PHASE TETRAGONAL_A6 % 1 1 !
56: CONST TETRAGONAL_A6 : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

AG2PU (Ag–Pu)

Id: phase:ag-pu:ag2pu; status needs_review
No structure assigned. Why: no_on_hull_entry_in_both; no_structure_token; sgte_mmc2_row_incomplete
Candidate (literature_printed): (Ag2Pu) · ? — printed with a label mapped to this phase
Candidate (sgte_mmc2): (Ag2Pu) — Hallstedt 2025 mmc2 row for AG2PU: Ag2Pu
Stoichiometry: Ag 0.6667, Pu 0.3333
Stability: stable in 1 of 1 calculated diagram(s): 300–1092.7 K, x(Pu) 0.33333–0.33333
Literature: 17 values (17 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-pu:ag2pu
paper: paper:10.1007/s11669-020-00813-5:Ag2Pu
tdb: tdb:AgPu-20Zho.tdb:AG2PU

TDB models of AG2PU (1): PHASE and CONSTITUENT statements as written

AgPu-20Zho.tdb: AG2PU, type code %, sha256 3a0aa8760514e86a…

80: PHASE AG2PU % 2 2 1 !
81: CONST AG2PU : AG : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

AG51PU14 (Ag–Pu)

Id: phase:ag-pu:ag51pu14; status assigned
Structure: Ag51Gd14 · hP68 · P6/m (175); type st:ag51gd14-hp68; 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: Ag 0.7846, Pu 0.2154
Stability: stable in 1 of 1 calculated diagram(s): 300–1250 K, x(Pu) 0.21538–0.21538
Literature: 7 values (7 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-pu:ag51pu14
paper: paper:10.1007/s11669-020-00813-5:Ag51Pu14
tdb: tdb:AgPu-20Zho.tdb:AG51PU14

TDB models of AG51PU14 (1): PHASE and CONSTITUENT statements as written

AgPu-20Zho.tdb: AG51PU14, type code %, sha256 3a0aa8760514e86a…

75: PHASE AG51PU14 % 2 51 14 !
76: CONST AG51PU14 : AG : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

BCC_A2 (Ag–Pu)

Id: phase:ag-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): 755.67–3999.25 K, x(Pu) 0.42–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-pu:bcc-a2
paper: paper:10.1007/s11669-020-00813-5:(εPu)
tdb: tdb:AgPu-20Zho.tdb:BCC_A2

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

AgPu-20Zho.tdb: BCC_A2, type code %B, sha256 3a0aa8760514e86a…

45: PHASE BCC_A2 %B 2 1 3 !
46: CONST BCC_A2 : AG PU% : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

FCC_A1 (Ag–Pu)

Id: phase:ag-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): 300–1266.15 K, x(Pu) 0–1
Literature: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-pu:fcc-a1
paper: paper:10.1007/s11669-020-00813-5:(Ag), paper:10.1007/s11669-020-00813-5:(δPu)
tdb: tdb:AgPu-20Zho.tdb:FCC_A1

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

AgPu-20Zho.tdb: FCC_A1, type code %A, sha256 3a0aa8760514e86a…

40: PHASE FCC_A1 %A 2 1 1 !
41: CONST FCC_A1 : AG% PU% : VA : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

HCP_A3 (Ag–Pu)

Id: phase:ag-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: Ag 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:ag-pu:hcp-a3
tdb: tdb:AgPu-20Zho.tdb:HCP_A3

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

AgPu-20Zho.tdb: HCP_A3, type code %A, sha256 3a0aa8760514e86a…

50: PHASE HCP_A3 %A 2 1 0.5 !
51: CONST HCP_A3 : AG : VA : !

Example references (1 of 1; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase

LIQUID (Ag–Pu)

Id: phase:ag-pu:liquid; status assigned
Structure: liquid; type st:liquid; liquid; confidence high
Stability: stable in 1 of 1 calculated diagram(s): 909.75–4000 K, x(Pu) 0–1
Literature: 10 values (10 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-pu:liquid
paper: paper:10.1007/s11669-020-00813-5:Liquid#1, paper:10.1007/s11669-020-00813-5:Liquid#2
tdb: tdb:AgPu-20Zho.tdb:LIQUID

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

AgPu-20Zho.tdb: LIQUID, type code %, sha256 3a0aa8760514e86a…

35: PHASE LIQUID:L % 1 1 !
36: CONST LIQUID:L : AG PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

ALPHA_PU (Ag–Pu)

Id: phase:ag-pu:pu-alpha; status needs_review
No structure assigned. Why: no_structure_token; unary_composition
Candidate (literature_printed): alpha-Pu · mP16 — printed with a label mapped to this phase
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 — AgPu-20Zho.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: 2 values (2 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-pu:pu-alpha, corpus:phase:ag-pu:alpha-pu
paper: paper:10.1007/s11669-020-00813-5:(αPu)
tdb: tdb:AgPu-20Zho.tdb:ALPHA_PU

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

AgPu-20Zho.tdb: ALPHA_PU, type code %, sha256 3a0aa8760514e86a…

60: PHASE ALPHA_PU % 1 1 !
61: CONST ALPHA_PU : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

BETA_PU (Ag–Pu)

Id: phase:ag-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 — AgPu-20Zho.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: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (4): corpus: corpus:phase:ag-pu:pu-beta, corpus:phase:ag-pu:beta-pu
paper: paper:10.1007/s11669-020-00813-5:(βPu)
tdb: tdb:AgPu-20Zho.tdb:BETA_PU

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

AgPu-20Zho.tdb: BETA_PU, type code %, sha256 3a0aa8760514e86a…

65: PHASE BETA_PU % 1 1 !
66: CONST BETA_PU : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
cited as the source of values for this phase

GAMMA_PU (Ag–Pu)

Id: phase:ag-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 — AgPu-20Zho.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: 4 values (4 accepted) from 1 papers
Interactive: phase registry entry

Names (3): corpus: corpus:phase:ag-pu:pu-gamma
paper: paper:10.1007/s11669-020-00813-5:(γPu)
tdb: tdb:AgPu-20Zho.tdb:GAMMA_PU

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

AgPu-20Zho.tdb: GAMMA_PU, type code %, sha256 3a0aa8760514e86a…

70: PHASE GAMMA_PU % 1 1 !
71: CONST GAMMA_PU : PU : !

Example references (2 of 2; assessments first):

doi:10.1007/s11669-020-00813-5 Jiaqiang Zhou, Biao Hu, Yu Jiang, Chengliang Qiu, Yong Du, Huiqin Yin, Thermodynamic Modeling of the Ag-X (X = B, Fe, Sm, Pu) Binary Systems, J. Phase Equilib. Diffus. 41, 257-268 (2020).
assessment that models this phase; reports values for this phase
doi:10.2172/4104255 California Univ., Livermore. Lawrence Radiation Lab., D Wood, E Cramer, P Wallace, INVESTIGATION OF THE PLUTONIUM--SILVER SYSTEM., (1970).
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}
}