NbNi8: enthalpy of formation

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

Systems: Nb–Ni

Literature values

Enthalpy of formation of NbNi8 reported in the literature (2)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-14.49 kJ/mol (basis unstated)NbNi8298.15modelMiedema estimationNb–Ni[1] Joubert 2004
cites F 1988		Table 4, p. 5, row 2
report
-14.488 kJ/mol (basis unstated)NbNi8298.15modelNb–Ni[1] Joubert 2004Table 4, p. 5, row 1
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 NbNi8
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-14.49kJ/mol (basis unstated)5.000e-431.2 (model_calculated, calibrated)31.2
-14.488kJ/mol (basis unstated)5.000e-431.2 (model_calculated, calibrated)31.2

Sources

  1. J.-M. Joubert, B. Sundman, N. Dupin, Assessment of the niobium–nickel system, Calphad 28, 299-306 (2004). doi:10.1016/j.calphad.2004.09.004