Ce0.21Ga0.79: enthalpy of formation
3 accepted literature formation-enthalpy value(s) (experimental 2, model 1); experimental median -44.1 kJ/mol-atom (n = 2).
Systems: Ce–Ga
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -51.5 kJ/mol-atom ± 1.4 | Ce0.21Ga0.79 | 298.15 | experimental | Ga. Soln. Calori.; 1103 K | Ce–Ga | [1] Idbenali 2013 cites F 1998 | Table 4, p. 6, row 8 report | |
| -36.7 kJ/mol-atom ± 2.9 | Ce0.21Ga0.79 | 298.15 | experimental | Precipitation Cal. 1125 K | Ce–Ga | [1] Idbenali 2013 cites F 1998 | Table 4, p. 6, row 6 report | |
| -46.1 kJ/mol-atom | Ce0.21Ga0.79 | 298.15 | model | Miedema’s Model | Ce–Ga | [1] Idbenali 2013 cites Chkhikvadze 1977 | Table 4, p. 6, row 7 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 |
|---|---|---|---|---|---|---|---|---|
| -51.5 | kJ/mol-atom | 1.4 | 0.05 | 3.2 (solution_reaction_calorimetry, calibrated) | 3.2 | |||
| -36.7 | kJ/mol-atom | 2.9 | 0.05 | 3.2 (solution_reaction_calorimetry, calibrated) | 3.2 | |||
| -46.1 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 |
Sources
- Mohamed Idbenali, Colette Servant, M’barek Feddaoui, Thermodynamic Description of the Ce-Ga Binary System, J. Phase Equilib. Diffus. 34, 467-473 (2013). doi:10.1007/s11669-013-0261-y