SiB6: enthalpy of formation

3 accepted literature formation-enthalpy value(s) (experimental 2, unspecified 1).

Systems: B–Si

Literature values

Enthalpy of formation of SiB6 reported in the literature (3)
ValuePhase as printedT (K)ClassMethodSystemSourceLocationQuote
-148 kJ/mol (basis unstated) ± 7.5SiB61757experimentalB–Si[1] Chen 2009
cites Zaitsev 2002 doi		Table 1, p. 2, row 4
report
-121 kJ/mol (basis unstated) ± 48SiB61800experimentalB–Si[1] Chen 2009
cites Armas 1981 doi		Table 1, p. 2, row 5
report
-122.2 kJ/mol (basis unstated)SiB6298.15unspecifiedB–Si[1] Chen 2009
cites Gordienko 1995		Table 1, p. 2, 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 SiB6
ValueUnitPrintedReadingMethod (class, basis)CompositionScatterConversionEffective
-148kJ/mol (basis unstated)7.50.0524.5 (unknown, calibrated)24.5
-121kJ/mol (basis unstated)480.524.5 (unknown, calibrated)48
-122.2kJ/mol (basis unstated)0.0524.5 (unknown, calibrated)24.5

Sources

  1. H.M. Chen, H.Y. Qi, F. Zheng, L.B. Liu, Z.P. Jin, Thermodynamic assessment of the B–C–Si system, Journal of Alloys and Compounds 481, 182-189 (2009). doi:10.1016/j.jallcom.2009.03.044