Ni–U system

20 accepted literature values from 1 paper(s) (experimental 9, model 11); 1 calculated phase diagram(s).

Data: JSON · CSV · interactive explorer · interactive phase diagram · phases (13) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	9
model	11

Accepted values by property group
Property group	Values
invariant reaction	17
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
NiU-09Wan.tdb	C.P. Wang, Y. He, H.L. Zhang, X.J. Liu, J. Alloys Compd., 487, 126-31(2009). doi:10.1016/j.jallcom.2009.07.168	`9f6aef6a1ab79ad3761ed5a3cbc3c2eb115dd042c41af59c65ea13cf965fa5c1`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
NiU-09Wan.tdb	1563.12	NI5U_C15B (x(U) 0.16667) + LIQUID (x(U) 0.19898) + NI7U2_D2D (x(U) 0.22)
NiU-09Wan.tdb	1563.12	NI5U_C15B (x(U) 0.16667) + LIQUID (x(U) 0.19913) + NI7U2_D2D (x(U) 0.22)
NiU-09Wan.tdb	1563.12	NI5U_C15B (x(U) 0.16667) + LIQUID (x(U) 0.19887) + NI7U2_D2D (x(U) 0.22)
NiU-09Wan.tdb	1536.06	NI7U2_D2D (x(U) 0.22) + NI3U (x(U) 0.23) + LIQUID (x(U) 0.26874)
NiU-09Wan.tdb	1407.99	NI7U2_D2D (x(U) 0.22) + BCC_A2 (x(U) 1) + LIQUID (x(U) 1)
NiU-09Wan.tdb	1388.95	FCC_A1 (x(U) 0.01259) + LIQUID (x(U) 0.08069) + NI5U_C15B (x(U) 0.16667)
NiU-09Wan.tdb	1388.95	FCC_A1 (x(U) 0.01257) + LIQUID (x(U) 0.08066) + NI5U_C15B (x(U) 0.16667)
NiU-09Wan.tdb	1259.2	NI3U (x(U) 0.23) + NI2U_C14 (x(U) 0.33333) + LIQUID (x(U) 0.39098)
NiU-09Wan.tdb	1259.19	NI3U (x(U) 0.23) + NI2U_C14 (x(U) 0.33333) + LIQUID (x(U) 0.39144)
NiU-09Wan.tdb	1093.01	NI2U_C14 (x(U) 0.33333) + NI7U5 (x(U) 0.41667) + LIQUID (x(U) 0.53649)
NiU-09Wan.tdb	1093.01	NI2U_C14 (x(U) 0.33333) + NI7U5 (x(U) 0.41667) + LIQUID (x(U) 0.53607)
NiU-09Wan.tdb	1093.01	NI2U_C14 (x(U) 0.33333) + NI7U5 (x(U) 0.41667) + LIQUID (x(U) 0.53671)
NiU-09Wan.tdb	1063.55	LIQUID (x(U) 0.7473) + NIU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.97548)
NiU-09Wan.tdb	1063.55	LIQUID (x(U) 0.74731) + NIU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.97549)
NiU-09Wan.tdb	1055.94	NI7U5 (x(U) 0.41667) + NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.59162)
NiU-09Wan.tdb	1055.94	NI7U5 (x(U) 0.41667) + NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.5914)
NiU-09Wan.tdb	1055.94	NI7U5 (x(U) 0.41667) + NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.59198)
NiU-09Wan.tdb	1032.92	NIU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98242) + TETRAGONAL_U (x(U) 0.98983)
NiU-09Wan.tdb	1015.07	NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.65994) + NIU6_D2C (x(U) 0.85714)
NiU-09Wan.tdb	1015.07	NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.65981) + NIU6_D2C (x(U) 0.85714)
NiU-09Wan.tdb	1015.07	NI9U7 (x(U) 0.4375) + LIQUID (x(U) 0.66018) + NIU6_D2C (x(U) 0.85714)
NiU-09Wan.tdb	935	NIU6_D2C (x(U) 0.85714) + TETRAGONAL_U (x(U) 0.99726) + ORTHORHOMBIC_A20 (x(U) 0.99994)
NiU-09Wan.tdb	935	NIU6_D2C (x(U) 0.85714) + TETRAGONAL_U (x(U) 0.99728) + ORTHORHOMBIC_A20 (x(U) 0.99994)

Convex hulls: Materials Project DFT hull · OQMD DFT hull

Invariant reactions (literature)

Invariant reactions reported in the literature for the Ni–U system (17)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location
1562.15	eutectic: L -> ε + UNi5	L: U 0.2; ε: U 0.22; UNi5: U 0.167	model	[1] Wang 2009	Table 3, p. 4, row 18 report
1535.15	peritectoid: L + ε -> δ	L: U 0.269; ε: U 0.22; δ: U 0.23	model	[1] Wang 2009	Table 3, p. 4, row 14 report
1533.15	peritectoid: L + ε -> δ	L: U 0.26; ε: U 0.22; δ: U 0.23	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 13 report
1386.15	eutectic: L -> UNi5 + (Ni)	L: U 0.081; UNi5: U 0.167; (Ni): U 0.013	model	[1] Wang 2009	Table 3, p. 4, row 20 report
1383.15	eutectic: L -> UNi5 + (Ni)	L: U 0.09; UNi5: U 0.167; (Ni): U 0.01	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 19 report
1259.15	peritectoid: L + δ -> UNi2	L: U 0.39; δ: U 0.23; UNi2: U 0.333	model	[1] Wang 2009	Table 3, p. 4, row 12 report
1258.15	peritectoid: L + δ -> UNi2	L: U 0.375; δ: U 0.23; UNi2: U 0.333	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 11 report
1093.15	peritectoid: L + UNi2 -> U5Ni7	L: U 0.52; UNi2: U 0.333; U5Ni7: U 0.405	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 9 report
1093.15	peritectoid: L + UNi2 -> U5Ni7	L: U 0.53; UNi2: U 0.333; U5Ni7: U 0.415	model	[1] Wang 2009	Table 3, p. 4, row 10 report
1063.15	peritectoid: γU + L -> U6Ni	γU: U 0.976; L: U 0.747; U6Ni: U 0.857	model	[1] Wang 2009	Table 3, p. 4, row 4 report
1063.15	peritectoid: γU + L -> U6Ni	γU: U 0.98; L: U 0.725; U6Ni: U 0.857	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 3 report
1059.15	peritectoid: L + U5Ni7 -> U7Ni9	L: U 0.588; U5Ni7: U 0.418; U7Ni9: U 0.438	model	[1] Wang 2009	Table 3, p. 4, row 8 report
1058.15	peritectoid: L + U5Ni7 -> U7Ni9	L: U 0.58; U5Ni7: U 0.418; U7Ni9: U 0.438	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 7 report
1033.15	eutectic: γU -> βU + U6Ni	γU: U 0.985; βU: U 0.99; U6Ni: U 0.857	model	[1] Wang 2009	Table 3, p. 4, row 2 report
1033.15	eutectic: γU -> βU + U6Ni	γU: U 0.9875; βU: U 0.99; U6Ni: U 0.857	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 1 report
1015.15	eutectic: L -> U6Ni + U7Ni9	L: U 0.662; U6Ni: U 0.857; U7Ni9: U 0.438	model	[1] Wang 2009	Table 3, p. 4, row 6 report
1013.15	eutectic: L -> U6Ni + U7Ni9	L: U 0.67; U6Ni: U 0.857; U7Ni9: U 0.438	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 5 report

Other properties

Phase transition (3)

Phase transition, Ni–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Phase transition	1570.15 K	1570.15	congruent melting: L -> ε L: U 0.22; ε: U 0.22	model	[1] Wang 2009	Table 3, p. 4, row 15 report
Phase transition	1578.15 K	1578.15	congruent melting: L -> UNi5 L: U 0.167; UNi5: U 0.166667	experimental	[1] Wang 2009 cites Peterson 1988	Table 3, p. 4, row 16 report
Phase transition	1578.15 K	1578.15	congruent melting: L -> UNi5 L: U 0.167; UNi5: U 0.166667	model	[1] Wang 2009	Table 3, p. 4, row 17 report

Sources

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

C.P. Wang, Y. He, H.L. Zhang, X.J. Liu, Thermodynamic assessments of the U–Ni and Th–Ni systems, Journal of Alloys and Compounds 487, 126-131 (2009). doi:10.1016/j.jallcom.2009.07.168

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}
}