HfNb3: enthalpy of formation

2 accepted literature formation-enthalpy value(s) (DFT 2).

Systems: Hf–Nb

Literature values

Enthalpy of formation of HfNb3 reported in the literature (2)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
2.979 kJ/mol (basis unstated)HfNb30DFTab-initioHf–Nb[1] Ghosh 2002Table 6, p. 11, row 5
report
25.358 kJ/mol (basis unstated)HfNb30DFTab-initioHf–Nb[1] Ghosh 2002Table 6, p. 11, row 5
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 HfNb3
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
2.979kJ/mol (basis unstated)5.000e-433.58 (dft, calibrated)33.58
25.358kJ/mol (basis unstated)5.000e-433.58 (dft, calibrated)33.58

Sources

  1. G. Ghosh, A. van de Walle, M. Asta, G.B. Olson, Phase stability of the Hf-Nb system: From first-principles to CALPHAD, Calphad 26, 491-511 (2002). doi:10.1016/s0364-5916(02)80003-7