Al13Cr2: enthalpy of formation

3 accepted literature formation-enthalpy value(s) (experimental 1, model 2); experimental median -13.9 kJ/mol-atom (n = 1).

Systems: Al–Cr

Literature values

Enthalpy of formation of Al13Cr2 reported in the literature (3)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-13.9 kJ/mol-atomAl13Cr2298.15experimentalAl–Cr[1] Saunders 1986
cites ref. 35		Table 1, p. 4, row 1
report
-13.172 kJ/mol-atomAl13Cr21modelAl–Cr[1] Saunders 1986Table 4, p. 8, row 1
report
-13.17 kJ/mol-atomAl13Cr2modelAl–Cr[1] Saunders 1986Table 1, p. 4, row 2
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 Al13Cr2
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-13.9kJ/mol-atom0.053.5 (unknown, calibrated)3.5
-13.172kJ/mol-atom5.000e-43.9 (model_calculated, calibrated)3.9
-13.17kJ/mol-atom0.0053.9 (model_calculated, calibrated)3.9

Sources

  1. N. Saunders, V. G. Rivlin, Thermodynamic characterization of Al–Cr, Al–Zr, and Al–Cr–Zr alloy systems, Materials Science and Technology 2, 520-527 (1986). doi:10.1179/mst.1986.2.6.520