Pu–Zr system

8 accepted literature values from 1 paper(s) (model 3, unspecified 5); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (9) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
model	3
unspecified	5

Accepted values by property group
Property group	Values
invariant reaction	5
phase transition	3

Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Assessments with a calculated phase diagram
TDB file	Assessment	SHA-256	Links
PuZr-10Kur.tdb	M. Kurata, IOP Conf. Ser.: Mater. Sci. Eng., 9, 012022(2010).	`b56cc08b0fcadc133a5e30fb3c87a7934f063c37ad5a8e812b6b3659d8a6e9df`	viewer · TDB · JSON
PuZr-99Kur.tdb	M. Kurata, Calphad, 23, 305-37(1999). doi:10.1016/S0364-5916(00)00004-3	`c511e212529d822f5c5b56b22066c5bb032a867534fec2e2556abc409f798c00`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
PuZr-10Kur.tdb	861.4	FCC_A1 (x(Zr) 0.65231) + BCC_A2 (x(Zr) 0.72001) + HCP_A3 (x(Zr) 0.85656)
PuZr-10Kur.tdb	558.45	GAMMA_PU (x(Zr) 0.01746) + FCC_A1 (x(Zr) 0.02759) + PU4ZR (x(Zr) 0.2)
PuZr-10Kur.tdb	514.61	GAMMA_PU (x(Zr) 0.00805) + BETA_PU (x(Zr) 0.01408) + PU4ZR (x(Zr) 0.2)
PuZr-10Kur.tdb	506.77	PU4ZR (x(Zr) 0.2) + FCC_A1 (x(Zr) 0.59261) + HCP_A3 (x(Zr) 0.87078)
PuZr-10Kur.tdb	397.42	ALPHA_PU (x(Zr) 5.100e-4) + BETA_PU (x(Zr) 0.00105) + PU4ZR (x(Zr) 0.2)
PuZr-99Kur.tdb	1179.2	LIQUID (x(Zr) 0.12872) + FCC_A1 (x(Zr) 0.2131) + BCC_A2 (x(Zr) 0.25791)
PuZr-99Kur.tdb	1077.46	LIQUID (x(Zr) 0.07142) + BCC_A2 (x(Zr) 0.15202) + FCC_A1 (x(Zr) 0.15313)
PuZr-99Kur.tdb	857.69	FCC_A1 (x(Zr) 0.62309) + BCC_A2 (x(Zr) 0.70391) + HCP_A3 (x(Zr) 0.86681)
PuZr-99Kur.tdb	650.42	FCC_A1 (x(Zr) 0.11906) + PU4ZR (x(Zr) 0.16859) + FCC_A1#2 (x(Zr) 0.3953)
PuZr-99Kur.tdb	583.26	PU4ZR (x(Zr) 0.17247) + FCC_A1 (x(Zr) 0.52571) + HCP_A3 (x(Zr) 0.88727)
PuZr-99Kur.tdb	564.35	GAMMA_PU (x(Zr) 0.00294) + FCC_A1 (x(Zr) 0.0112) + PU4ZR (x(Zr) 0.13509)
PuZr-99Kur.tdb	505.29	GAMMA_PU (x(Zr) 0.00126) + BETA_PU (x(Zr) 0.00529) + PU4ZR (x(Zr) 0.12966)
PuZr-99Kur.tdb	397.62	ALPHA_PU (x(Zr) 9.400e-4) + BETA_PU (x(Zr) 9.400e-4) + PU4ZR (x(Zr) 0.12722)
PuZr-99Kur.tdb	397.62	ALPHA_PU (x(Zr) 9.400e-4) + BETA_PU (x(Zr) 9.400e-4) + PU4ZR (x(Zr) 0.12722)
PuZr-99Kur.tdb	314.72	ALPHA_PU (x(Zr) 7.500e-4) + PU4ZR (x(Zr) 0.13965) + HCP_A3 (x(Zr) 0.99347)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull PuZr-99Kur

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pu–Zr system (5)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
891	(δ-Pu,γ-Zr) + α-Zr <=> (ε-Pu,β-Zr)	(δ-Pu,γ-Zr): Zr 0.5; (ε-Pu,β-Zr): Zr 0.5	unspecified	[1] Kurata 1999 cites ref. 60Mar	Table 5, p. 18, row 7 report
870	(δ-Pu,γ-Zr) + α-Zr <=> (ε-Pu,β-Zr)	(δ-Pu,γ-Zr): Zr 0.5; (ε-Pu,β-Zr): Zr 0.5	unspecified	[1] Kurata 1999 cites ref. 92Suz	Table 5, p. 18, row 8 report
870	(δ-Pu,γ-Zr) + α-Zr <=> (ε-Pu,β-Zr)	(δ-Pu,γ-Zr): Zr 0.5; (ε-Pu,β-Zr): Zr 0.5	model	[1] Kurata 1999	Table 5, p. 18, row 6 report
758	δ-Pu <=> (ε-Pu,β-Zr) + (δ-Pu,γ-Zr)	(ε-Pu,β-Zr): Zr 0.5; (δ-Pu,γ-Zr): Zr 0.5	model	[1] Kurata 1999	Table 5, p. 18, row 4 report
758	δ-Pu <=> (ε-Pu,β-Zr) + (δ-Pu,γ-Zr)	(ε-Pu,β-Zr): Zr 0.5; (δ-Pu,γ-Zr): Zr 0.5	unspecified	[1] Kurata 1999 cites ref. 60Mar	Table 5, p. 18, row 5 report

Other properties

Phase transition (3)

Phase transition, Pu–Zr system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	903 K	903	(ε-Pu,β-Zr) <=> (δ-Pu,γ-Zr) (ε-Pu,β-Zr): Zr 0.5; (δ-Pu,γ-Zr): Zr 0.5	unspecified	[1] Kurata 1999 cites ref. 92Suz	Table 5, p. 18, row 3 report
Phase transition	904 K	904	(ε-Pu,β-Zr) <=> (δ-Pu,γ-Zr) (ε-Pu,β-Zr): Zr 0.5; (δ-Pu,γ-Zr): Zr 0.5	model	[1] Kurata 1999	Table 5, p. 18, row 1 report
Phase transition	913 K	913	(ε-Pu,β-Zr) <=> (δ-Pu,γ-Zr) (ε-Pu,β-Zr): Zr 0.5; (δ-Pu,γ-Zr): Zr 0.5	unspecified	[1] Kurata 1999 cites ref. 60Mar	Table 5, p. 18, row 2 report

Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

Masaki Kurata, Thermodynamic assessment of the Pu-U, Pu-Zr, and Pu-U-Zr systems, Calphad 23, 305-337 (1999). doi:10.1016/s0364-5916(00)00004-3

Please cite

R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735569
R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735859
R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). doi:10.5281/zenodo.23735891
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 the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); 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). 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_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@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}
}