Ni5H7: enthalpy of formation

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

Systems: H–Ni

Literature values

Enthalpy of formation of Ni5H7 reported in the literature (2)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-19.257 kJ/mol (basis unstated)(Ce)(Ni)5(H)7modelDFT, CALPHADH–Ni[1] Hannappel 2024Table 3, p. 5, row 3
report
-11.176 kJ/mol (basis unstated)(Ce)(Ni)5(H)7modelDFT, CALPHADH–Ni[1] Hannappel 2024Table 3, p. 5, row 3
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 Ni5H7
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-19.257kJ/mol (basis unstated)5.000e-419.5 (model_calculated, calibrated)19.5
-11.176kJ/mol (basis unstated)5.000e-419.5 (model_calculated, calibrated)19.5

Sources

  1. Peter Hannappel, Ebert Alvares, Felix Heubner, Claudio Pistidda, Paul Jerabek, Thomas Weißgärber, Thermodynamic assessment of the Ce H and CeNi5 H system, Calphad 85, 102701 (2024). doi:10.1016/j.calphad.2024.102701