Cr3La2O12: enthalpy of formation
3 accepted literature formation-enthalpy value(s) (experimental 1, model 2); experimental median -233 kJ/mol-atom (n = 1).
Systems: Cr–La–O
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -233 kJ/mol-atom ± 11.7 | La2(CrO4)3 | 298.15 | experimental | Cr–La–O | [1] Povoden 2009 cites Tsyrenova | p. 2 report | The enthalpy of formation of La2(CrO4)3 from the elements at 298 K was proposed by Tsyrenova et al.[29] to be -3961 ± 11.7 kJ mol-1. | |
| -3961 kJ/mol (basis unstated) ± 11.7 | La2(CrO4)3 | 298.15 | model | Cr–La–O | [1] Povoden 2009 cites Tsyrenova | Table 1, p. 3, row 20 report | ||
| -3845 kJ/mol (basis unstated) | La2(CrO4)3 | 298.15 | model | Cr–La–O | [1] Povoden 2009 | Table 1, p. 3, row 19 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 |
|---|---|---|---|---|---|---|---|---|
| -233 | kJ/mol-atom | 11.7 | 0.05 | 3.5 (unknown, calibrated) | 11.7 | |||
| -3961 | kJ/mol (basis unstated) | 11.7 | 0.5 | 3.9 (model_calculated, calibrated) | 11.7 | |||
| -3845 | kJ/mol (basis unstated) | 0.5 | 3.9 (model_calculated, calibrated) | 3.9 |
Sources
- E. Povoden, M. Chen, A.N. Grundy, T. Ivas, L.J. Gauckler, Thermodynamic Assessment of the La-Cr-O System, J. Phase Equilib. Diffus. 30, 12-27 (2009). doi:10.1007/s11669-008-9463-0