Ga4Nb: enthalpy of formation

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

Systems: Ga–Nb

Literature values

Enthalpy of formation of Ga4Nb reported in the literature (2)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-15.083 kJ/mol-atomht_Ga4Nb298.15modelGa–Nb[1] Tamim 2023Table 2, p. 8, row 2
report
-14.908 kJ/mol-atomht_Ga4Nb298.15modelMiedemaGa–Nb[1] Tamim 2023
cites De 1988		Table 2, p. 8, 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 Ga4Nb
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-15.083kJ/mol-atom5.000e-43.9 (model_calculated, calibrated)3.9
-14.908kJ/mol-atom5.000e-43.9 (model_calculated, calibrated)3.9

Sources

  1. Rkia Tamim, Olivier Rapaud, Rémy Boulesteix, Alexandre Maître, Thermodynamic assessment of the Ga–Gd, Ga–Nb and Gd–Nb binary phase diagrams towards the Ga–Gd–Nb system, Calphad 82, 102596 (2023). doi:10.1016/j.calphad.2023.102596