Pu–Th–U system

27 accepted literature values from 1 paper(s) (experimental 7, model 20); 0 calculated phase diagram(s). 25 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	7
model	20

Accepted values by property group
Property group	Values
invariant reaction	19
formation	4
heat capacity / entropy / enthalpy	4

Invariant reactions (literature)

Invariant reactions reported in the literature for the Pu–Th–U system (19)
T (K)	Reaction / phases	Class	Source	Location
1923	critical point: L -> L1 + L2	model	[1] Beneš 2014	Table 4, p. 4, row 4 report
1658	monotectic: L1 <-> β-Th + L2	experimental	[1] Beneš 2014	Table 4, p. 4, row 15 report
1655	monotectic: L1 -> β-Th + L2	model	[1] Beneš 2014	Table 4, p. 4, row 3 report
1535	metatectic/catatectic: β-Th -> α-Th + L	model	[1] Beneš 2014	Table 4, p. 4, row 2 report
1533	metatectic/catatectic: β-Th <-> α-Th + L	experimental	[1] Beneš 2014	Table 4, p. 4, row 14 report
1384	eutectic: L -> α-Th + γ-U	model	[1] Beneš 2014	Table 4, p. 4, row 1 report
1367	eutectic: L <-> α-Th + γ-U	experimental	[1] Beneš 2014	Table 4, p. 4, row 13 report
887	peritectic: L + (β-Th,Pu) <-> Th3Pu7	experimental	[1] Beneš 2014	Table 4, p. 4, row 19 report
883	peritectic: L + (β-Th,Pu) -> Th3Pu7	model	[1] Beneš 2014	Table 4, p. 4, row 10 report
875	eutectic: L <-> Th3Pu7 + (ϵ-Pu,Th)	experimental	[1] Beneš 2014	Table 4, p. 4, row 18 report
874	eutectic: L -> Th3Pu7 + (ϵ-Pu,Th)	model	[1] Beneš 2014	Table 4, p. 4, row 9 report
864	eutectoid: (β-Th,Pu) <-> Th3Pu7 + (α-Th,Pu)	experimental	[1] Beneš 2014	Table 4, p. 4, row 17 report
858	eutectoid: (β-Th,Pu) -> Th3Pu7 + (α-Th,Pu)	model	[1] Beneš 2014	Table 4, p. 4, row 8 report
857	quasi-peritectic: L + (β-Th,U,Pu) -> Th3Pu7 + (α-Th,U,Pu)	model	[1] Beneš 2014	Table 4, p. 4, row 12 report
855	eutectic: L -> Th3Pu7 + (ϵ-Pu,γ-U,Th) + (α-Th,U,Pu)	model	[1] Beneš 2014	Table 4, p. 4, row 11 report
783	peritectoid: Th3Pu7 + (ϵ-Pu,Th) -> (δ-Pu,Th)	model	[1] Beneš 2014	Table 4, p. 4, row 7 report
774	peritectoid: Th3Pu7 + (ϵ-Pu,Th) <-> (δ-Pu,Th)	experimental	[1] Beneš 2014	Table 4, p. 4, row 16 report
764	peritectoid: (δ-Pu,Th) + (ϵ-Pu,Th) -> (δ'-Pu,Th)	model	[1] Beneš 2014	Table 4, p. 4, row 6 report
575	eutectoid: (δ-Pu,Th) -> Th3Pu7 + γ-Pu	model	[1] Beneš 2014	Table 4, p. 4, row 5 report

Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from dft_parity.json.

Enthalpies of formation, Pu–Th–U system (4)
Phase	Value	T (K)	Class	Source	Location
Puliquid	6.6081 kJ/mol (basis unstated)	298.15	model	[1] Beneš 2014	Table 1, p. 2, row 34 report
Thliquid	23.7655 kJ/mol (basis unstated)	298.15	model	[1] Beneš 2014	Table 1, p. 2, row 3 report
Uliquid	12.3555 kJ/mol (basis unstated)	298.15	model	[1] Beneš 2014	Table 1, p. 2, row 11 report
δ′-Pu	5.1995 kJ/mol-atom	298.15	model	[1] Beneš 2014	Table 1, p. 2, row 26 report

Other properties

Heat capacity / entropy / enthalpy (4)

Heat capacity / entropy / enthalpy, Pu–Th–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Entropy printed: S0(298.15)	66.974 J/mol (basis unstated)/K	298.15	Puliquid	model	[1] Beneš 2014	Table 1, p. 2, row 34 report
Entropy printed: S0(298.15)	69.86 J/mol (basis unstated)/K	298.15	Thliquid	model	[1] Beneš 2014	Table 1, p. 2, row 3 report
Entropy printed: S0(298.15)	60.524 J/mol (basis unstated)/K	298.15	Uliquid	model	[1] Beneš 2014	Table 1, p. 2, row 11 report
Entropy printed: S0(298.15)	66.609 J/mol-atom/K	298.15	δ′-Pu alloy: Th 0, U 0	model	[1] Beneš 2014	Table 1, p. 2, row 26 report

Sources

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

O. Beneš, D. Manara, R.J.M. Konings, Thermodynamic assessment of the Th–U–Pu system, Journal of Nuclear Materials 449, 15-22 (2014). doi:10.1016/j.jnucmat.2014.02.001

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 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_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}
}