GaP: enthalpy of formation
4 accepted literature formation-enthalpy value(s) (model 2, unspecified 2).
Systems: Ga–P
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -129.9 kJ/mol (basis unstated) | GaP | 298.15 | model | Ga–P | [1] Onderka 2002 cites Kaufman 1981 | Table AI, p. 19, row 9 report | ||
| -114.6 kJ/mol (basis unstated) | GaP | 298.15 | model | Ga–P | [1] Onderka 2002 cites Ansara 1994 | Table AI, p. 19, row 10 report | ||
| -102.1 kJ/mol (basis unstated) | GaP | 298.15 | unspecified | Ga–P | [1] Onderka 2002 cites Wagman 1968 | Table AI, p. 19, row 11 report | ||
| -99.6 kJ/mol (basis unstated) | GaP | 298.15 | unspecified | Ga–P | [1] Onderka 2002 cites Ilegems 1974 | Table AI, p. 19, row 12 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.
| Value | Unit | Printed | Reading | Method (class, basis) | Composition | Scatter | Conversion | Effective |
|---|---|---|---|---|---|---|---|---|
| -129.9 | kJ/mol (basis unstated) | 0.05 | 7.8 (model_calculated, calibrated) | 7.8 | ||||
| -114.6 | kJ/mol (basis unstated) | 0.05 | 7.8 (model_calculated, calibrated) | 7.8 | ||||
| -102.1 | kJ/mol (basis unstated) | 0.05 | 7 (unknown, calibrated) | 7 | ||||
| -99.6 | kJ/mol (basis unstated) | 0.05 | 7 (unknown, calibrated) | 7 |
Sources
- B. Onderka, J. Unland, R. Schmid-Fetzer, Thermodynamics and phase stability in the In–N system, J. Mater. Res. 17, 3065-3083 (2002). doi:10.1557/jmr.2002.0445