Ga–U system

56 accepted literature values from 2 paper(s) (experimental 50, unspecified 6); 2 calculated phase diagram(s). 3 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (11) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	50
unspecified	6

Accepted values by property group
Property group	Values
invariant reaction	25
phase transition	2
phase equilibrium	17
crystal structure	12

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
GaU-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	`e761d0dee84952be5262d72eb68417ac2dd7fc8977e3ae90b47be577cf34af6f`	viewer · TDB · JSON
GaU-18Mou.tdb	C. Moussa, A. Berche, J. Barbosa, M. Pasturel, B. Stepnik, O. Tougait, J. Nucl. Mater., 499, 361-71(2018). doi:10.1016/j.jnucmat.2017.11.037	`f541e5cb65bafef3badc9b7684ca290c6afb0ebd360def827648fa0f93d73ee6`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
GaU-08Wan.tdb	1532.19	GA2U_C32 (x(U) 0.33333) + GA3U2 (x(U) 0.4) + LIQUID (x(U) 0.51791)
GaU-08Wan.tdb	1532.19	GA2U_C32 (x(U) 0.33333) + GA3U2 (x(U) 0.4) + LIQUID (x(U) 0.51814)
GaU-08Wan.tdb	1497.75	LIQUID (x(U) 0.17358) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-08Wan.tdb	1497.75	LIQUID (x(U) 0.17351) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-08Wan.tdb	1497.75	LIQUID (x(U) 0.17352) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-08Wan.tdb	1303.14	GA3U2 (x(U) 0.4) + LIQUID (x(U) 0.78855) + BCC_A2 (x(U) 0.9078)
GaU-08Wan.tdb	1006.58	GA3U2 (x(U) 0.4) + BCC_A2 (x(U) 0.96996) + TETRAGONAL_U (x(U) 0.99105)
GaU-08Wan.tdb	933.28	GA3U2 (x(U) 0.4) + TETRAGONAL_U (x(U) 0.9945) + ORTHORHOMBIC_A20 (x(U) 0.99784)
GaU-08Wan.tdb	933.28	GA3U2 (x(U) 0.4) + TETRAGONAL_U (x(U) 0.99454) + ORTHORHOMBIC_A20 (x(U) 0.99786)
GaU-08Wan.tdb	302.91	ORTHORHOMBIC_A20 (x(U) 0) + LIQUID (x(U) 0) + GA3U_L12 (x(U) 0.25)
GaU-08Wan.tdb	302.91	LIQUID (x(U) 0) + ORTHORHOMBIC_A11 (x(U) 0) + GA3U_L12 (x(U) 0.25)
GaU-18Mou.tdb	1556.93	LIQUID (x(U) 0.19122) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-18Mou.tdb	1556.93	LIQUID (x(U) 0.1911) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-18Mou.tdb	1556.93	LIQUID (x(U) 0.19092) + GA3U_L12 (x(U) 0.25) + GA2U_C32 (x(U) 0.33333)
GaU-18Mou.tdb	1535.71	GA2U_C32 (x(U) 0.33333) + GA5U3 (x(U) 0.375) + LIQUID (x(U) 0.54005)
GaU-18Mou.tdb	1292.84	GA5U3 (x(U) 0.375) + LIQUID (x(U) 0.77989) + BCC_A2 (x(U) 0.91516)
GaU-18Mou.tdb	1013.52	GA5U3 (x(U) 0.375) + BCC_A2 (x(U) 0.97003) + TETRAGONAL_U (x(U) 0.98871)
GaU-18Mou.tdb	925.77	GA5U3 (x(U) 0.375) + TETRAGONAL_U (x(U) 0.99308) + ORTHORHOMBIC_A20 (x(U) 0.99931)
GaU-18Mou.tdb	925.77	GA5U3 (x(U) 0.375) + TETRAGONAL_U (x(U) 0.99313) + ORTHORHOMBIC_A20 (x(U) 0.99932)
GaU-18Mou.tdb	302.91	ORTHORHOMBIC_A11 (x(U) 0) + LIQUID (x(U) 0) + GA3U_L12 (x(U) 0.25)

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

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ga–U system (25)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1628.15	congruent melting: L -> Ga2U	L: Ga 0.667; Ga2U: Ga 0.666667, U 0.333333	unspecified	[1] Wang 2008	Table 3, p. 5, row 6 report
1628.15	congruent melting: L -> Ga2U	L: Ga 0.667; Ga2U: Ga 0.666667, U 0.333333	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 5 report
1628	liquidus		experimental	[2] Moussa 2018	Table 3, p. 4, row 4 report
1623	liquidus		experimental	[2] Moussa 2018	Table 3, p. 4, row 11 report
1621	liquidus		experimental	[2] Moussa 2018	Table 3, p. 4, row 6 report
1608	liquidus		experimental	[2] Moussa 2018	Table 3, p. 4, row 2 report
1560	UGa3 -> UGa2 + L	UGa3: Ga 0.75, U 0.25 (basis unresolved); UGa2: Ga 0.666667, U 0.333333 (basis unresolved)	experimental	[2] Moussa 2018	Table 3, p. 4, row 1 report
1548	U3Ga5 -> UGa2 + L	U3Ga5: Ga 0.625, U 0.375 (basis unresolved); UGa2: Ga 0.666667, U 0.333333 (basis unresolved)	experimental	[2] Moussa 2018	Table 3, p. 4, row 5 report
1545	U3Ga5 -> UGa2 + L	U3Ga5: Ga 0.625, U 0.375 (basis unresolved); UGa2: Ga 0.666667, U 0.333333 (basis unresolved)	experimental	[2] Moussa 2018	Table 3, p. 4, row 3 report
1533.15	peritectic: L + Ga2U -> Ga3U2	L: Ga 0.483; Ga2U: Ga 0.667; Ga3U2: Ga 0.6	unspecified	[1] Wang 2008	Table 3, p. 5, row 4 report
1533.15	peritectic: L + Ga2U -> Ga3U2	L: Ga 0.445; Ga2U: Ga 0.667; Ga3U2: Ga 0.6	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 3 report
1523.15	peritectic: L + Ga2U -> Ga3U	L: Ga 0.815; Ga2U: Ga 0.667; Ga3U: Ga 0.75	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 7 report
1523.15	peritectic: L + Ga2U -> Ga3U	L: Ga 0.815; Ga2U: Ga 0.667; Ga3U: Ga 0.75	unspecified	[1] Wang 2008	Table 3, p. 5, row 8 report
1509	U3Ga5 -> UGa2 + L	U3Ga5: Ga 0.625, U 0.375 (basis unresolved); UGa2: Ga 0.666667, U 0.333333 (basis unresolved)	experimental	[2] Moussa 2018	Table 3, p. 4, row 10 report
1411	liquidus		experimental	[2] Moussa 2018	Table 3, p. 4, row 15 report
1303.15	eutectic: L -> γ (U) + Ga3U2	L: Ga 0.214; γ (U): Ga 0.099; Ga3U2: Ga 0.6	unspecified	[1] Wang 2008	Table 3, p. 5, row 2 report
1303.15	eutectic: L -> γ (U) + Ga3U2	L: Ga 0.22; γ (U): Ga 0.092; Ga3U2: Ga 0.6	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 1 report
1293	U3Ga5 + γU -> L	U3Ga5: Ga 0.625, U 0.375 (basis unresolved)	experimental	[2] Moussa 2018	Table 3, p. 4, row 14 report
1009	polymorphic: βU -> γU		experimental	[2] Moussa 2018	Table 3, p. 4, row 8 report
1008.15	eutectoid: γ (U) -> Ga3U2 + β (U)	γ (U): Ga 0.01; Ga3U2: Ga 0.6; β (U): Ga 0.001	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 9 report
1008	polymorphic: βU -> γU		experimental	[2] Moussa 2018	Table 3, p. 4, row 13 report
1007.15	eutectoid: γ (U) -> Ga3U2 + β (U)	γ (U): Ga 0.03; Ga3U2: Ga 0.6; β (U): Ga 0.001	unspecified	[1] Wang 2008	Table 3, p. 5, row 10 report
933.15	eutectoid: β (U) -> Ga3U2 + α (U)	β (U): Ga 5.000e-4; Ga3U2: Ga 0.6	unspecified	[1] Wang 2008	Table 3, p. 5, row 12 report
933.15	eutectoid: β (U) -> Ga3U2 + α (U)	Ga3U2: Ga 0.6	experimental	[1] Wang 2008 cites Buschow 1973 doi	Table 3, p. 5, row 11 report
932	polymorphic: αU -> βU		experimental	[2] Moussa 2018	Table 3, p. 4, row 7 report

Other properties

Phase transition (2)

Phase transition, Ga–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	80 K	80	UGa2	experimental	[2] Moussa 2018 cites Andreev 1978	p. 2 report	It crystallizes with the hexagonal AlB2 type of structure as suggested by Buschow [15], latter confirmed by Ref. [17] at least down to 80 K, a temperature at which a hexagonal to orthorhombic transition associated to magnetic ordering is supposed to occur [20].
Phase transition	1628 K	1628	congruent transformation	experimental	[2] Moussa 2018 cites Buschow 1973 doi	p. 2 report	This assumption is in disagreement with the DTA measurements [15], which does not show any transition below the congruent melting of UGa2 estimated at 1628 K and the crystallographic analysis of a single crystal directly grown from the melt which shows the AlB2 type of structure [22].

Phase equilibrium (17)

Phase equilibrium, Ga–U system
Property	T (K)	Phases / composition	Class	Source	Location
Phase assemblage		U3Ga5 alloy: Ga 0.43, U 0.57	experimental	[2] Moussa 2018	Table 2, p. 4, row 2 report
Phase assemblage		U3Ga5 alloy: Ga 0.46, U 0.54	experimental	[2] Moussa 2018	Table 2, p. 4, row 4 report
Phase assemblage		U3Ga5 alloy: Ga 0.6, U 0.4	experimental	[2] Moussa 2018	Table 2, p. 4, row 6 report
Phase assemblage		U3Ga5 alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 8 report
Phase assemblage		UGa2 alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 9 report
Phase assemblage		αU alloy: Ga 0.46, U 0.54	experimental	[2] Moussa 2018	Table 2, p. 4, row 3 report
Phase assemblage		αU alloy: Ga 0.43, U 0.57	experimental	[2] Moussa 2018	Table 2, p. 4, row 1 report
Phase assemblage		αU alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 7 report
Phase assemblage		αU alloy: Ga 0.6, U 0.4	experimental	[2] Moussa 2018	Table 2, p. 4, row 5 report
Phase assemblage	1150	U3Ga5 alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 11 report
Phase assemblage	1150	UGa2 alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 12 report
Phase assemblage	1150	UGa3 alloy: Ga 0.75, U 0.25	experimental	[2] Moussa 2018	Table 2, p. 4, row 17 report
Phase assemblage	1150	αU alloy: Ga 0.61, U 0.39	experimental	[2] Moussa 2018	Table 2, p. 4, row 10 report
Phase assemblage	1500	U3Ga5 alloy: Ga 0.64, U 0.36	experimental	[2] Moussa 2018	Table 2, p. 4, row 14 report
Phase assemblage	1500	UGa2 alloy: Ga 0.7, U 0.3	experimental	[2] Moussa 2018	Table 2, p. 4, row 16 report
Phase assemblage	1500	UGa2 alloy: Ga 0.64, U 0.36	experimental	[2] Moussa 2018	Table 2, p. 4, row 13 report
Phase assemblage	1500	UGa3 alloy: Ga 0.7, U 0.3	experimental	[2] Moussa 2018	Table 2, p. 4, row 15 report

Crystal structure (12)

Crystal structure, Ga–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	9.396 Å		U3Ga5 alloy: Ga 0.625, U 0.375	experimental	[2] Moussa 2018 cites Dayan 1985 doi	Table 1, p. 3, row 9 report
Lattice a	4.212 Å		UGa2 alloy: Ga 0.666667, U 0.333333	experimental	[2] Moussa 2018 cites Buschow 1973 doi	Table 1, p. 3, row 10 report
Lattice a	4.257 Å		UGa3 alloy: Ga 0.75, U 0.25	experimental	[2] Moussa 2018 cites Frost 1953	Table 1, p. 3, row 11 report
Lattice a	9.442 not_printed ± 6.000e-4	1373	U3Ga5 alloy: U 0.375	experimental	[2] Moussa 2018	Table 4, p. 5, row 1 report
Lattice b	7.575 Å		U3Ga5 alloy: Ga 0.625, U 0.375	experimental	[2] Moussa 2018 cites Dayan 1985 doi	Table 1, p. 3, row 9 report
Lattice b	4.212 Å		UGa2 alloy: Ga 0.666667, U 0.333333	experimental	[2] Moussa 2018 cites Buschow 1973 doi	Table 1, p. 3, row 10 report
Lattice b	4.257 Å		UGa3 alloy: Ga 0.75, U 0.25	experimental	[2] Moussa 2018 cites Frost 1953	Table 1, p. 3, row 11 report
Lattice b	7.6291 not_printed ± 5.000e-4	1373	U3Ga5 alloy: U 0.375	experimental	[2] Moussa 2018	Table 4, p. 5, row 1 report
Lattice c	9.387 Å		U3Ga5 alloy: Ga 0.625, U 0.375	experimental	[2] Moussa 2018 cites Dayan 1985 doi	Table 1, p. 3, row 9 report
Lattice c	4.024 Å		UGa2 alloy: Ga 0.666667, U 0.333333	experimental	[2] Moussa 2018 cites Buschow 1973 doi	Table 1, p. 3, row 10 report
Lattice c	4.257 Å		UGa3 alloy: Ga 0.75, U 0.25	experimental	[2] Moussa 2018 cites Frost 1953	Table 1, p. 3, row 11 report
Lattice c	9.4486 not_printed ± 7.000e-4	1373	U3Ga5 alloy: U 0.375	experimental	[2] Moussa 2018	Table 4, p. 5, row 1 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
Chantal Moussa, Alexandre Berche, José Barbosa, Mathieu Pasturel, Bertrand Stepnik, Olivier Tougait, Experimental investigation of the phase equilibria and thermodynamic assessment in the U-Ga and U-Al-Ga systems, Journal of Nuclear Materials 499, 361-371 (2018). doi:10.1016/j.jnucmat.2017.11.037

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}
}