U–W system

25 accepted literature values from 2 paper(s) (experimental 3, model 22); 2 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (6) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	3
model	22

Accepted values by property group
Property group	Values
invariant reaction	9
mixing / partial	16

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
UW-08Wan.tdb	J. Wang, X.J. Liu, C.P. Wang, J. Nucl. Mater., 380, 105-10(2008). doi:10.1016/j.jnucmat.2008.07.009	`b39bc5b283c025c04ac160ca05d3aea7dc5e5bb6ca777b7655122fd99a205168`	viewer · TDB · JSON
UW-11Ber.tdb	A. Berche, N. Dupin, C. Gueneau, C. Rado, B. Sundman, J.C. Dumas, J. Nucl. Mater., 411, 131-43(2011). doi:10.1016/j.jnucmat.2011.01.043	`4aad821713451c831e32726b1f0b20df93190ebc0ec2f8fa015040d80af94dd4`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
UW-08Wan.tdb	1407.62	BCC_A2#2 (x(W) 0.00238) + LIQUID (x(W) 0.00259) + BCC_A2 (x(W) 0.99762)
UW-08Wan.tdb	1047.45	TETRAGONAL_U (x(W) 0) + BCC_A2#2 (x(W) 8.000e-4) + BCC_A2 (x(W) 0.9992)
UW-08Wan.tdb	1047.45	TETRAGONAL_U (x(W) 0) + BCC_A2 (x(W) 8.000e-4) + BCC_A2#2 (x(W) 0.9992)
UW-08Wan.tdb	942.02	ORTHORHOMBIC_A20 (x(W) 0) + TETRAGONAL_U (x(W) 0) + BCC_A2 (x(W) 0.99953)
UW-08Wan.tdb	942.02	TETRAGONAL_U (x(W) 0) + ORTHORHOMBIC_A20 (x(W) 0) + BCC_A2 (x(W) 0.99953)
UW-08Wan.tdb	942.02	TETRAGONAL_U (x(W) 0) + ORTHORHOMBIC_A20 (x(W) 0) + BCC_A2 (x(W) 0.99953)
UW-11Ber.tdb	1404.22	BCC_A2 (x(W) 0.00107) + LIQUID (x(W) 0.00318) + BCC_A2#2 (x(W) 0.99893)
UW-11Ber.tdb	1048.81	TETRAGONAL_U (x(W) 1.000e-5) + BCC_A2#2 (x(W) 1.000e-4) + BCC_A2 (x(W) 0.9999)
UW-11Ber.tdb	942.02	ORTHORHOMBIC_A20 (x(W) 0) + TETRAGONAL_U (x(W) 0) + BCC_A2 (x(W) 0.99997)
UW-11Ber.tdb	942.02	TETRAGONAL_U (x(W) 0) + ORTHORHOMBIC_A20 (x(W) 0) + BCC_A2 (x(W) 0.99997)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull UW-08Wan

Invariant reactions (literature)

Invariant reactions reported in the literature for the U–W system (9)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1408.15	eutectic: L → γ (U) + bcc (W)		experimental	[1] Wang 2008 cites Pandian 2000	Table 4, p. 5, row 1 report
1407.65	eutectic: L → γ (U) + bcc (W)	L: W 0.0026; γ (U): W 0.0024; bcc (W): W 0.997	model	[1] Wang 2008	Table 4, p. 5, row 2 report
1404	eutectic: Liquid -> (γ-U) + (W)		model	[2] Berche 2011	Table 2, p. 5, row 1 report
1049.15	eutectoid: γ (U) → β (U) + bcc (W)		experimental	[1] Wang 2008 cites Pandian 2000	Table 4, p. 5, row 3 report
1049	(γ-U) -> (β-U) + (W)		model	[2] Berche 2011	Table 2, p. 5, row 2 report
1047.65	eutectoid: γ (U) → β (U) + bcc (W)	γ (U): W 0.001; β (U): W 0; bcc (W): W 0.997	model	[1] Wang 2008	Table 4, p. 5, row 4 report
942.15	congruent transformation: β (U) → γ (U) + bcc (W)	β (U): W 0; γ (U): W 0; bcc (W): W 0.997	model	[1] Wang 2008	Table 4, p. 5, row 6 report
942	(β-U) -> (α-U) + (W)		model	[2] Berche 2011	Table 2, p. 5, row 3 report
941.15	congruent transformation: β (U) → γ (U) + bcc (W)		experimental	[1] Wang 2008 cites Pandian 2000	Table 4, p. 5, row 5 report

Other properties

Mixing / partial (16)

Mixing / partial, U–W system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Enthalpy of mixing printed: mixing enthalpy	0.02 kJ/mol (basis unstated)	3773.15	liquid alloy: U 0.7, W 0.3	model	[1] Wang 2008	Table 5, p. 5, row 13 report
Enthalpy of mixing printed: mixing enthalpy	5.2 kJ/mol (basis unstated)	3773.15	liquid alloy: U 0.3, W 0.7	model	[1] Wang 2008	Table 5, p. 5, row 5 report
Enthalpy of mixing printed: mixing enthalpy	3.17 kJ/mol (basis unstated)	3773.15	liquid alloy: U 0.5, W 0.5	model	[1] Wang 2008	Table 5, p. 5, row 9 report
Enthalpy of mixing printed: mixing enthalpy	3.4 kJ/mol (basis unstated)	3773.15	liquid alloy: U 0.1, W 0.9	model	[1] Wang 2008	Table 5, p. 5, row 1 report
Enthalpy of mixing printed: mixing enthalpy	3.32 kJ/mol (basis unstated)	3873.15	liquid alloy: U 0.1, W 0.9	model	[1] Wang 2008	Table 5, p. 5, row 2 report
Enthalpy of mixing printed: mixing enthalpy	0.049 kJ/mol (basis unstated)	3873.15	liquid alloy: U 0.7, W 0.3	model	[1] Wang 2008	Table 5, p. 5, row 14 report
Enthalpy of mixing printed: mixing enthalpy	5.22 kJ/mol (basis unstated)	3873.15	liquid alloy: U 0.3, W 0.7	model	[1] Wang 2008	Table 5, p. 5, row 6 report
Enthalpy of mixing printed: mixing enthalpy	3.19 kJ/mol (basis unstated)	3873.15	liquid alloy: U 0.5, W 0.5	model	[1] Wang 2008	Table 5, p. 5, row 10 report
Enthalpy of mixing printed: mixing enthalpy	3.34 kJ/mol (basis unstated)	3973.15	liquid alloy: U 0.1, W 0.9	model	[1] Wang 2008	Table 5, p. 5, row 3 report
Enthalpy of mixing printed: mixing enthalpy	3.14 kJ/mol (basis unstated)	3973.15	liquid alloy: U 0.5, W 0.5	model	[1] Wang 2008	Table 5, p. 5, row 11 report
Enthalpy of mixing printed: mixing enthalpy	0.078 kJ/mol (basis unstated)	3973.15	liquid alloy: U 0.7, W 0.3	model	[1] Wang 2008	Table 5, p. 5, row 15 report
Enthalpy of mixing printed: mixing enthalpy	5.2 kJ/mol (basis unstated)	3973.15	liquid alloy: U 0.3, W 0.7	model	[1] Wang 2008	Table 5, p. 5, row 7 report
Enthalpy of mixing printed: mixing enthalpy	0.049 kJ/mol (basis unstated)	4073.15	liquid alloy: U 0.7, W 0.3	model	[1] Wang 2008	Table 5, p. 5, row 16 report
Enthalpy of mixing printed: mixing enthalpy	3.12 kJ/mol (basis unstated)	4073.15	liquid alloy: U 0.5, W 0.5	model	[1] Wang 2008	Table 5, p. 5, row 12 report
Enthalpy of mixing printed: mixing enthalpy	3.33 kJ/mol (basis unstated)	4073.15	liquid alloy: U 0.1, W 0.9	model	[1] Wang 2008	Table 5, p. 5, row 4 report
Enthalpy of mixing printed: mixing enthalpy	5.21 kJ/mol (basis unstated)	4073.15	liquid alloy: U 0.3, W 0.7	model	[1] Wang 2008	Table 5, p. 5, row 8 report

Sources

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

J. Wang, X.J. Liu, C.P. Wang, Thermodynamic calculation of phase equilibria of the U–Ga and U–W systems, Journal of Nuclear Materials 380, 105-110 (2008). doi:10.1016/j.jnucmat.2008.07.009
A. Berche, N. Dupin, C. Guéneau, C. Rado, B. Sundman, J.C. Dumas, Calphad thermodynamic description of some binary systems involving U, Journal of Nuclear Materials 411, 131-143 (2011). doi:10.1016/j.jnucmat.2011.01.043

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}
}