NaUO3: enthalpy of formation

3 accepted literature formation-enthalpy value(s) (experimental 1, model 1, DFT 1); experimental median -298.98 kJ/mol-atom (n = 1).

Systems: Na–O–U

Literature values

Enthalpy of formation of NaUO3 reported in the literature (3)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-298.98 kJ/mol-atom ± 2NaUO3298.15experimentalexperimental (calorimetry)Na–O–U[1] Smith 2017
cites Guillaumont 2003		Table 8, p. 12, row 13
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-298.98 kJ/mol-atomNaUO3298.15modelCALPHADNa–O–U[1] Smith 2017Table 8, p. 12, row 15
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-298.92 kJ/mol-atomNaUO3298.15DFTDFTNa–O–U[1] Smith 2017Table 8, p. 12, row 14
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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 NaUO3
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-298.98kJ/mol-atom20.013.2 (solution_reaction_calorimetry, calibrated)3.2
-298.98kJ/mol-atom0.013.9 (model_calculated, calibrated)3.9
-298.92kJ/mol-atom0.019.966 (dft, calibrated)9.966

Sources

  1. A.L. Smith, C. Guéneau, J.-L. Flèche, S. Chatain, O. Beneš, R.J.M. Konings, Thermodynamic assessment of the Na-O and Na-U-O systems: Margin to the safe operation of SFRs, The Journal of Chemical Thermodynamics 114, 93-115 (2017). doi:10.1016/j.jct.2017.04.003