FeU6: enthalpy of formation

7 accepted literature formation-enthalpy value(s) (experimental 1, model 6).

Systems: Fe–U

Literature values

Enthalpy of formation of FeU6 reported in the literature (7)
Value	Phase as printed	T (K)	Class	Method	System	Source	Location	Quote
-6.75 unspecified ± 1.3	Fe0.143U0.857	298.15	experimental	high temperature solution calorimetry	Fe–U	[1] Chatain 2003 cites Labroche 2000	p. 3 report	For 1 mol Fe0.143U0.857, ⌬H0f (298 K) ⳱ (-6.75 ± 1.3) kJ/mol.
-26.438 kJ/mol (basis unstated)	FeU6	298.15	model		Fe–U	[1] Chatain 2003 cites Okamoto 1993 doi	Table 7, p. 8, row 19 report
-21.343 kJ/mol (basis unstated)	FeU6	298.15	model		Fe–U	[1] Chatain 2003 cites Kurata 2003	Table 7, p. 8, row 21 report
-20.931 kJ/mol (basis unstated)	Fe0.143U0.857	298.15	model		Fe–U	[1] Chatain 2003	Table 7, p. 8, row 20 report
-7.312 kJ/mol (basis unstated)	Fe0.143U0.857	298.15	model		Fe–U	[1] Chatain 2003	Table 7, p. 8, row 17 report
-6.75 kJ/mol (basis unstated) ± 1.3	FeU6	298.15	model		Fe–U	[1] Chatain 2003 cites Labroche 2000	Table 7, p. 8, row 16 report
-2.33 kJ/mol (basis unstated) ± 0.72	Fe0.143U0.857	298.15	model		Fe–U	[1] Chatain 2003 cites Ivanov 1962	Table 7, p. 8, row 18 report

Uncertainty budget

Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.

Uncertainty budget of the literature values of FeU6
Value	Unit	Printed	Reading	Method (class, basis)	Effective
-6.75	unspecified	1.3	0.005	unit 'unspecified' not convertible to kJ/mol-atom	1.3
-26.438	kJ/mol (basis unstated)		5.000e-5	27.3 (model_calculated, calibrated)	27.3
-21.343	kJ/mol (basis unstated)		5.000e-5	27.3 (model_calculated, calibrated)	27.3
-20.931	kJ/mol (basis unstated)		5.000e-4	3.9 (model_calculated, calibrated)	3.9
-7.312	kJ/mol (basis unstated)		5.000e-4	3.9 (model_calculated, calibrated)	3.9
-6.75	kJ/mol (basis unstated)	1.3	5.000e-5	27.3 (model_calculated, calibrated)	27.3
-2.33	kJ/mol (basis unstated)	0.72	5.000e-4	3.9 (model_calculated, calibrated)	3.9

Sources

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

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-Parity: DFT-vs-experiment formation-enthalpy benchmark (version 2026.10; Version 1, machine-extracted), Zenodo (2026). doi:10.5281/zenodo.23735943
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); 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); G. Kim, S. V. Meschel, P. Nash, W. Chen, Experimental formation enthalpies for intermetallic phases and other inorganic compounds, Scientific Data 4 (2017) 170162, https://doi.org/10.1038/sdata.2017.162; 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. 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_dft_benchmark_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Parity: DFT-vs-experiment formation-enthalpy benchmark}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735943},
  url       = {https://doi.org/10.5281/zenodo.23735943},
  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}
}