Al4Mn: enthalpy of formation
5 accepted literature formation-enthalpy value(s) (experimental 2, model 3); experimental median -21.67 kJ/mol-atom (n = 2).
Systems: Al–Mn
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -21.67 kJ/mol-atom | Al4Mn | 298.15 | experimental | Al–Mn | [1] Jansson 1992 cites Kubaschewski 1960 doi | Table II, p. 4, row 13 report | ||
| -21.67 kJ/mol-atom ± 1.05 | Al4Mn | 298.15 | experimental | Al–Mn | [2] Liu 1999 cites Kubaschewski 1960 doi | Table 4, p. 12, row 6 report | ||
| -21.23 kJ/mol-atom | Al4Mn | model | Al–Mn | [2] Liu 1999 | Table 4, p. 12, row 4 report | |||
| -21.13 kJ/mol-atom | Al4Mn | model | Al–Mn | [1] Jansson 1992 | Table II, p. 4, row 12 report | |||
| -21.13 kJ/mol-atom | Al4Mn | model | Al–Mn | [2] Liu 1999 cites Jansson 1992 doi | Table 4, p. 12, row 5 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 |
|---|---|---|---|---|---|---|---|---|
| -21.67 | kJ/mol-atom | 0.005 | 3.5 (unknown, calibrated) | 3.5 | ||||
| -21.67 | kJ/mol-atom | 1.05 | 0.005 | 3.5 (unknown, calibrated) | 3.5 | |||
| -21.23 | kJ/mol-atom | 0.005 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -21.13 | kJ/mol-atom | 0.005 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -21.13 | kJ/mol-atom | 0.005 | 3.9 (model_calculated, calibrated) | 3.9 |
Sources
- Åke Jansson, A thermodynamic evaluation of the Al-Mn system, Metall Trans A 23, 2953-2962 (1992). doi:10.1007/bf02646113
- X. J. Liu, I. Ohnuma, R. Kainuma, K. Ishida, Thermodynamic assessment of the Aluminum-Manganese (Al-Mn) binary phase diagram, JPE 20, 45-56 (1999). doi:10.1361/105497199770335938