Fe–U system

70 accepted literature values from 2 paper(s) (experimental 32, model 33, unspecified 5); 4 calculated phase diagram(s). 8 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 (8) · papers (bibliography) · Markdown

Accepted values by evidence class
Evidence class	Values
experimental	32
model	33
unspecified	5

Accepted values by property group
Property group	Values
invariant reaction	30
phase transition	2
formation	33
activity / EMF / Gibbs energy	2
crystal structure	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
FeU-03Cha.tdb	S. Chatain, C. Gueneau, D. Labroche, J. Rogez, O. Dugne, J. Phase Equilib., 24, 122-31(2003). doi:10.1361/105497103770330730	`2b3cb4ca0291ed3cec49faea394963700e207a689d4e2669ea1bf1da911adea9`	viewer · TDB · JSON
FeU-10Kur.tdb	M. Kurata, IOP Conf. Ser.: Mater. Sci. Eng., 9, 012023(2010).	`bc15fcbedb33d3b61b1207f0bb6fae978c164b78fc1705c9750db8401fdc214d`	viewer · TDB · JSON
FeU-23Jia.tdb	Y. Jiang, Y. He, W. Zheng, J. Zhang, D. Zhang, X. Lu, J. Nucl. Mater., 574, 154180(2023). doi:10.1016/j.jnucmat.2022.154180	`eb9a00d844e17ebb775573d55afbaedddf4b75254b5ba94855c3b473cfd410fb`	viewer · TDB · JSON
FeU-98Kur.tdb	M. Kurata, T. Ogata, K. Nakamura, T. Ogawa, J. Alloys Compd., 271-273, 636-40(1998). doi:10.1016/S0925-8388(98)00176-5	`d4682ee275bf4ce8df794fbf2ac24bedb60801d70b4ce2bb78eb04d0dee9d56e`	viewer · TDB · JSON

Calculated three-phase invariants (model, mole fraction of the second component)
TDB file	T (K)	Phases at the invariant
FeU-03Cha.tdb	1667.47	BCC_A2 (x(U) 0) + FCC_A1 (x(U) 0) + LIQUID (x(U) 0.06522)
FeU-03Cha.tdb	1667.47	FCC_A1 (x(U) 0) + BCC_A2 (x(U) 0) + LIQUID (x(U) 0.06508)
FeU-03Cha.tdb	1351.07	FCC_A1 (x(U) 0) + LIQUID (x(U) 0.17463) + FE2U_C15 (x(U) 0.33333)
FeU-03Cha.tdb	1351.06	FCC_A1 (x(U) 0) + LIQUID (x(U) 0.17453) + FE2U_C15 (x(U) 0.33333)
FeU-03Cha.tdb	1351.06	FCC_A1 (x(U) 0) + LIQUID (x(U) 0.17455) + FE2U_C15 (x(U) 0.33333)
FeU-03Cha.tdb	1184.81	FCC_A1 (x(U) 0) + BCC_A2 (x(U) 0) + FE2U_C15 (x(U) 0.33333)
FeU-03Cha.tdb	1012.62	LIQUID (x(U) 0.81648) + BCC_A2 (x(U) 0.9849) + TETRAGONAL_U (x(U) 0.99884)
FeU-03Cha.tdb	938.79	LIQUID (x(U) 0.77537) + TETRAGONAL_U (x(U) 0.99878) + ORTHORHOMBIC_A20 (x(U) 1)
FeU-03Cha.tdb	938.79	LIQUID (x(U) 0.77535) + TETRAGONAL_U (x(U) 0.99878) + ORTHORHOMBIC_A20 (x(U) 1)
FeU-03Cha.tdb	886.24	LIQUID (x(U) 0.74214) + FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1)
FeU-03Cha.tdb	886.24	LIQUID (x(U) 0.74209) + FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1)
FeU-03Cha.tdb	886.24	LIQUID (x(U) 0.74232) + FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1)
FeU-03Cha.tdb	875.01	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.71754) + FEU6_D2C (x(U) 0.85714)
FeU-03Cha.tdb	875.01	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.71736) + FEU6_D2C (x(U) 0.85714)
FeU-10Kur.tdb	1656.15	FCC_A1 (x(U) 0.00188) + BCC_A2 (x(U) 0.00228) + LIQUID (x(U) 0.06914)
FeU-10Kur.tdb	1352.33	FCC_A1 (x(U) 0.00596) + LIQUID (x(U) 0.16976) + FE2U_C15 (x(U) 0.33333)
FeU-10Kur.tdb	1352.33	FCC_A1 (x(U) 0.00596) + LIQUID (x(U) 0.16975) + FE2U_C15 (x(U) 0.33333)
FeU-10Kur.tdb	1183.38	BCC_A2 (x(U) 0.0024) + FCC_A1 (x(U) 0.00252) + FE2U_C15 (x(U) 0.33333)
FeU-10Kur.tdb	1183.38	BCC_A2 (x(U) 0.00234) + FCC_A1 (x(U) 0.00246) + FE2U_C15 (x(U) 0.33333)
FeU-10Kur.tdb	1075.51	LIQUID (x(U) 0.80905) + FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98861)
FeU-10Kur.tdb	1075.51	LIQUID (x(U) 0.80908) + FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98861)
FeU-10Kur.tdb	1035.69	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99299) + TETRAGONAL_U (x(U) 1)
FeU-10Kur.tdb	1035.69	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99297) + TETRAGONAL_U (x(U) 1)
FeU-10Kur.tdb	998.06	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.68841) + FEU6_D2C (x(U) 0.85714)
FeU-10Kur.tdb	998.06	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.68826) + FEU6_D2C (x(U) 0.85714)
FeU-10Kur.tdb	942.02	FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)
FeU-23Jia.tdb	1676.75	BCC_A2 (x(U) 0.0016) + FCC_A1 (x(U) 0.00193) + LIQUID (x(U) 0.05845)
FeU-23Jia.tdb	1394.59	FCC_A1 (x(U) 0.00719) + LIQUID (x(U) 0.15566) + FE2U_C15 (x(U) 0.33333)
FeU-23Jia.tdb	1394.59	FCC_A1 (x(U) 0.00719) + LIQUID (x(U) 0.15563) + FE2U_C15 (x(U) 0.33333)
FeU-23Jia.tdb	1176.56	BCC_A2 (x(U) 0.00164) + FCC_A1 (x(U) 0.00238) + FE2U_C15 (x(U) 0.33333)
FeU-23Jia.tdb	1176.56	BCC_A2 (x(U) 0.00163) + FCC_A1 (x(U) 0.00236) + FE2U_C15 (x(U) 0.33333)
FeU-23Jia.tdb	1083.21	FEU6_D2C (x(U) 0.85714) + LIQUID (x(U) 0.85936) + BCC_A2 (x(U) 0.97987)
FeU-23Jia.tdb	1083.21	FEU6_D2C (x(U) 0.85714) + LIQUID (x(U) 0.85936) + BCC_A2 (x(U) 0.97987)
FeU-23Jia.tdb	1028.4	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98931) + TETRAGONAL_U (x(U) 1)
FeU-23Jia.tdb	1028.4	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98931) + TETRAGONAL_U (x(U) 1)
FeU-23Jia.tdb	1017.81	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.71714) + FEU6_D2C (x(U) 0.85714)
FeU-23Jia.tdb	942.02	FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)
FeU-98Kur.tdb	1643.64	FCC_A1 (x(U) 0.00178) + BCC_A2 (x(U) 0.00262) + LIQUID (x(U) 0.07346)
FeU-98Kur.tdb	1352.21	FCC_A1 (x(U) 0.00596) + LIQUID (x(U) 0.17194) + FE2U_C15 (x(U) 0.33333)
FeU-98Kur.tdb	1352.21	FCC_A1 (x(U) 0.00596) + LIQUID (x(U) 0.1719) + FE2U_C15 (x(U) 0.33333)
FeU-98Kur.tdb	1194.39	FCC_A1 (x(U) 0.00308) + BCC_A2 (x(U) 0.00389) + FE2U_C15 (x(U) 0.33333)
FeU-98Kur.tdb	1194.38	FCC_A1 (x(U) 0.00312) + BCC_A2 (x(U) 0.00394) + FE2U_C15 (x(U) 0.33333)
FeU-98Kur.tdb	1083.01	LIQUID (x(U) 0.83206) + FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.98409)
FeU-98Kur.tdb	1032.44	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99128) + TETRAGONAL_U (x(U) 1)
FeU-98Kur.tdb	1032.44	FEU6_D2C (x(U) 0.85714) + BCC_A2 (x(U) 0.99126) + TETRAGONAL_U (x(U) 1)
FeU-98Kur.tdb	998.07	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.68427) + FEU6_D2C (x(U) 0.85714)
FeU-98Kur.tdb	998.07	FE2U_C15 (x(U) 0.33333) + LIQUID (x(U) 0.68424) + FEU6_D2C (x(U) 0.85714)
FeU-98Kur.tdb	942.02	FEU6_D2C (x(U) 0.85714) + ORTHORHOMBIC_A20 (x(U) 1) + TETRAGONAL_U (x(U) 1)

Convex hulls: Materials Project DFT hull · OQMD DFT hull · CALPHAD hull FeU-03Cha · CALPHAD hull FeU-10Kur · CALPHAD hull FeU-98Kur

Invariant reactions (literature)

Invariant reactions reported in the literature for the Fe–U system (30)
T (K)	Reaction / phases	Compositions (mole fraction)	Class	Source	Location	Quote
1673	L + bcc - Fe <-> fcc - Fe		experimental	[1] Chatain 2003 cites Michaud 1966 doi	Table 6, p. 8, row 1 report
1667	L + bcc - Fe <-> fcc - Fe		model	[1] Chatain 2003	Table 6, p. 8, row 2 report
1509	congruent melting: L <-> Fe2U	L: Fe 0.666667, U 0.333333; Fe2U: Fe 0.666667, U 0.333333	model	[1] Chatain 2003	Table 6, p. 8, row 13 report
1508	congruent melting: L <-> Fe2U	L: Fe 0.666667, U 0.333333; Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Michaud 1966 doi	Table 6, p. 8, row 9 report
1507	congruent melting: L <-> Fe2U	L: Fe 0.666667, U 0.333333; Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Labroche 2000	Table 6, p. 8, row 10 report
1503	congruent melting: L <-> Fe2U	L: Fe 0.666667, U 0.333333; Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Grogan 1950	Table 6, p. 8, row 11 report
1501	congruent melting: L <-> Fe2U	L: Fe 0.666667, U 0.333333; Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 12 report
1353	eutectic: L <-> fcc - Fe + Fe2U	L: U 0.17; Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 3 report
1351	eutectic: L <-> fcc - Fe + Fe2U	L: U 0.1745; Fe2U: Fe 0.666667, U 0.333333	model	[1] Chatain 2003	Table 6, p. 8, row 4 report
1198	fcc - Fe + Fe2U <-> bcc - Fe	Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Leibowitz 1991 doi	Table 6, p. 8, row 7 report
1185	fcc - Fe + Fe2U <-> bcc - Fe	Fe2U: Fe 0.666667, U 0.333333	model	[1] Chatain 2003	Table 6, p. 8, row 8 report
1183	fcc - Fe + Fe2U <-> bcc - Fe	Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 6 report
1182	fcc - Fe + Fe2U <-> bcc - Fe	Fe2U: Fe 0.666667, U 0.333333	experimental	[1] Chatain 2003 cites Michaud 1966 doi	Table 6, p. 8, row 5 report
1104	peritectic: L + bcc - U <-> FeU6	L: U 0.8494; FeU6: Fe 0.142857, U 0.857143; bcc-U: U 0.9865	model	[1] Chatain 2003	Table 6, p. 8, row 20 report
1104	peritectic		model	[1] Chatain 2003	p. 7 report	The calculated peritectic transformation temperature is equal to 1104 K for a liquid uranium content of 84.94 at.%.
1102	peritectic: L + bcc - U <-> FeU6	FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Labroche 2000	Table 6, p. 8, row 19 report
1102	peritectic		experimental	[1] Chatain 2003	p. 7 report	Labroche's FeU6 peritectic temperature of 1102 K was measured by calorimetry during slow heating with the same apparatus that was used for Fe2U.
1078	peritectic: L + bcc - U <-> FeU6	L: U 0.85; bcc - U: U 0.985; FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Grogan 1950	Table 6, p. 8, row 18 report
1039	bcc - U <-> tetragonal - U + FeU6	FeU6: Fe 0.142857, U 0.857143; tetragonal-U: U 0.9954	model	[1] Chatain 2003	Table 6, p. 8, row 24 report
1036	bcc - U <-> tetragonal - U + FeU6	FeU6: Fe 0.142857, U 0.857143; bcc-U: U 0.992	experimental	[1] Chatain 2003 cites Straatmann 1964	Table 6, p. 8, row 21 report
1035	bcc - U <-> tetragonal - U + FeU6	FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 22 report
1034	bcc - U <-> tetragonal - U + FeU6	FeU6: Fe 0.142857, U 0.857143; tetragonal-U: U 0.996	experimental	[1] Chatain 2003 cites Grogan 1950	Table 6, p. 8, row 23 report
1002	eutectic: L <-> Fe2U + FeU6	Fe2U: Fe 0.666667, U 0.333333; FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Grogan 1950	Table 6, p. 8, row 16 report
996	eutectic: L <-> Fe2U + FeU6	L: U 0.66; Fe2U: Fe 0.666667, U 0.333333; FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 15 report
994	eutectic: L <-> Fe2U + FeU6	Fe2U: Fe 0.666667, U 0.333333; FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Leibowitz 1991 doi	Table 6, p. 8, row 14 report
992.5	eutectic: L <-> Fe2U + FeU6	L: U 0.6651; Fe2U: Fe 0.666667, U 0.333333; FeU6: Fe 0.142857, U 0.857143	model	[1] Chatain 2003	Table 6, p. 8, row 17 report
943	tetragonal - U <-> FeU6 + orthorhombic - U	FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Grogan 1950	Table 6, p. 8, row 27 report
942	tetragonal - U <-> FeU6 + orthorhombic - U	FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Chapman 1984 doi	Table 6, p. 8, row 25 report
941	tetragonal - U <-> FeU6 + orthorhombic - U	tetragonal - U: U 0.99825; FeU6: Fe 0.142857, U 0.857143	experimental	[1] Chatain 2003 cites Straatmann 1964	Table 6, p. 8, row 26 report
937.8	tetragonal - U <-> FeU6 + orthorhombic - U	tetragonal - U: U 0.9984; FeU6: Fe 0.142857, U 0.857143	model	[1] Chatain 2003	Table 6, p. 8, row 28 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, Fe–U system (21)
Phase	Compound	Value	T (K)	Class	MP DFT (kJ/mol-atom)	OQMD DFT (kJ/mol-atom)	Source	Location	Quote
Fe0.143U0.857		-20.931 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003	Table 7, p. 8, row 20 report
Fe0.143U0.857		-7.312 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003	Table 7, p. 8, row 17 report
Fe0.143U0.857		-6.75 unspecified ± 1.3	298.15	experimental			[1] Chatain 2003 cites Labroche 2000	p. 3 report	For 1 mol Fe0.143U0.857, ⌬H0f (298 K) ⳱ (-6.75 ± 1.3) kJ/mol.
Fe0.143U0.857		-2.33 kJ/mol (basis unstated) ± 0.72	298.15	model			[1] Chatain 2003 cites Ivanov 1962	Table 7, p. 8, row 18 report
Fe0.66U0.33		-30.08 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Kurata 2003	Table 7, p. 8, row 15 report
Fe0.66U0.33		-20.6 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Campbell 1977 doi	Table 7, p. 8, row 8 report
Fe0.66U0.33		-16.3 kJ/mol (basis unstated) ± 0.6	298.15	model			[1] Chatain 2003 cites Labroche 2000	Table 7, p. 8, row 5 report
Fe0.66U0.33		-15.886 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003	Table 7, p. 8, row 6 report
Fe0.66U0.33		-14.01 kJ/mol (basis unstated) ± 1.8	298.15	model			[1] Chatain 2003 cites Antony 1996 doi	Table 7, p. 8, row 7 report
Fe0.66U0.33		-10.739 kJ/mol (basis unstated) ± 0.42	298.15	model			[1] Chatain 2003 cites Akhachinskiy 1962	Table 7, p. 8, row 9 report
Fe2U		-34.112 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003	Table 7, p. 8, row 14 report
Fe2U		-25.314 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Okamoto 1993 doi	Table 7, p. 8, row 13 report
Fe2U		-23.54 kJ/mol (basis unstated) ± 0.45	298.15	model			[1] Chatain 2003 cites Kanno 1974	Table 7, p. 8, row 10 report
Fe2U		-16.922 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003	Table 7, p. 8, row 11 report
Fe2U	Fe2U	-16.3 kJ/mol-atom ± 0.6	298.15	experimental	-9.82 (mp-aaaabfdq)	-8.017 (oqmd-19298)	[1] Chatain 2003 cites Labroche 2000	Table 3, p. 3, row 3 report
Fe2U		-15.025 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Gardie 1992 doi	Table 7, p. 8, row 12 report
Fe2U	Fe2U	-14.01 kJ/mol-atom ± 1.8	298.15	experimental	-9.82 (mp-aaaabfdq)	-8.017 (oqmd-19298)	[1] Chatain 2003 cites Antony 1996 doi	Table 3, p. 3, row 2 report
Fe2U	Fe2U	-10.74 kJ/mol-atom ± 0.42	298.15	experimental	-9.82 (mp-aaaabfdq)	-8.017 (oqmd-19298)	[1] Chatain 2003 cites Akhachinskiy 1962	Table 3, p. 3, row 1 report
FeU6		-26.438 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Okamoto 1993 doi	Table 7, p. 8, row 19 report
FeU6		-21.343 kJ/mol (basis unstated)	298.15	model			[1] Chatain 2003 cites Kurata 2003	Table 7, p. 8, row 21 report
FeU6		-6.75 kJ/mol (basis unstated) ± 1.3	298.15	model			[1] Chatain 2003 cites Labroche 2000	Table 7, p. 8, row 16 report

Other properties

Phase transition (2)

Phase transition, Fe–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Phase transition	1300 K	1300	other	experimental	[1] Chatain 2003	p. 3 report	For Fe2U, a ␭-type heat capacity anomaly occurs around 1300 K.
Phase transition	1509 K	1509	congruent melting	model	[1] Chatain 2003	p. 7 report	The calculated congruent melting point of Fe2U is equal to 1509 K, which is consistent with the selected data and very close to Labroche's value.

Formation (12)

Formation, Fe–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-5.4 kJ/mol-atom	998	Fe2U alloy: U 0.333333	model	[2] Kurata 1998 cites Leibowitz 1991 doi	Table 1, p. 3, row 6 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-14.7 kJ/mol-atom	998	Fe2U alloy: U 0.333333	model	[2] Kurata 1998 cites Okamoto 1995	Table 1, p. 3, row 5 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-13 kJ/mol-atom	998	Fe2U alloy: U 0.333333	unspecified	[2] Kurata 1998 cites Chiotti 1981	Table 1, p. 3, row 4 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-17.9 kJ/mol-atom	998	Fe2U alloy: U 0.333333	experimental	[2] Kurata 1998 cites Gardie 1992 doi	Table 1, p. 3, row 2 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-20 kJ/mol-atom	998	Fe2U alloy: U 0.333333	experimental	[2] Kurata 1998 cites Yoshihara 1974 doi	Table 1, p. 3, row 3 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-20.1 kJ/mol-atom	998	Fe2U alloy: U 0.333333	model	[2] Kurata 1998	Table 1, p. 3, row 1 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-13.4 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	unspecified	[2] Kurata 1998 cites Chiotti 1981	Table 1, p. 3, row 10 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-3.1 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	model	[2] Kurata 1998 cites Leibowitz 1991 doi	Table 1, p. 3, row 12 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-18.5 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	experimental	[2] Kurata 1998 cites Yoshihara 1974 doi	Table 1, p. 3, row 9 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-18.4 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	experimental	[2] Kurata 1998 cites Gardie 1992 doi	Table 1, p. 3, row 8 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-15.7 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	model	[2] Kurata 1998 cites Okamoto 1995	Table 1, p. 3, row 11 report
Gibbs energy of formation printed: Gibbs energy of Fe2U formation	-18.8 kJ/mol-atom	1504	Fe2U alloy: U 0.333333	model	[2] Kurata 1998	Table 1, p. 3, row 7 report

Activity / EMF / Gibbs energy (2)

Activity / EMF / Gibbs energy, Fe–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location	Quote
Gibbs energy printed: ⌬G0f (FeU6)	-4.43 unspecified ± 0.86	998		experimental	[1] Chatain 2003	p. 3 report	⌬G0f (Fe2U) (kJ/mol) ⳱ (-17.6 ± 1.13) kJ/mol at 1501 K ⌬G0f (FeU6) (kJ/mol) ⳱ (-4.43 ± 0.86) kJ/mol at 998 K
Gibbs energy printed: ⌬G0f (Fe2U)	-17.6 unspecified ± 1.13	1501		experimental	[1] Chatain 2003	p. 3 report	⌬G0f (Fe2U) (kJ/mol) ⳱ (-17.6 ± 1.13) kJ/mol at 1501 K ⌬G0f (FeU6) (kJ/mol) ⳱ (-4.43 ± 0.86) kJ/mol at 998 K

Crystal structure (3)

Crystal structure, Fe–U system
Property	Value	T (K)	Phases / composition	Class	Source	Location
Lattice a	7.055 Å	298.15	Fe2U	unspecified	[1] Chatain 2003 cites Villars 1991	Table 2, p. 3, row 4 report
Lattice a	10.2499 Å	298.15	FeU6	unspecified	[1] Chatain 2003 cites Villars 1991	Table 2, p. 3, row 5 report
Lattice c	5.25 Å	298.15	FeU6	unspecified	[1] Chatain 2003 cites Villars 1991	Table 2, p. 3, row 5 report

Sources

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

S. Chatain, C. Guéneau, D. Labroche, O. Dugne, J. Rogez, Thermodynamic assessment of the Fe-U binary system, JPE 24, 122-131 (2003). doi:10.1361/105497103770330730
Masaki Kurata, Takanari Ogata, Kinya Nakamura, Toru Ogawa, Thermodynamic assessment of the Fe–U, U–Zr and Fe–U–Zr systems, Journal of Alloys and Compounds 271-273, 636-640 (1998). doi:10.1016/s0925-8388(98)00176-5

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}
}