CeSi: enthalpy of formation
10 accepted literature formation-enthalpy value(s) (experimental 1, model 4, unspecified 5); experimental median -71.1 kJ/mol-atom (n = 1); Materials Project -59.9 kJ/mol-atom (mp-aaaabfgd); OQMD -69.324 kJ/mol-atom (oqmd-18278).
Systems: Ce–Si
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -71.1 kJ/mol-atom ± 3.3 | CeSi | 298.15 | experimental | Calorimetry | Ce–Si | [1] Huang 2016 cites Meschel 1995 doi | Table 8, p. 9, row 1 report | |
| -71.1 kJ/mol-atom | CeSi | 298.15 | model | Calculated | Ce–Si | [1] Huang 2016 cites Grobner 2004 doi | Table 8, p. 9, row 7 report | |
| -70.5 kJ/mol-atom | CeSi | 298.15 | model | Calculated | Ce–Si | [1] Huang 2016 cites Shukla 2009 doi | Table 8, p. 9, row 13 report | |
| -70.082 kJ/mol-atom | CeSi | 298.15 | model | Calculated | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 26 report | |
| -70 kJ/mol-atom | CeSi | 298.15 | model | Calculated | Ce–Si | [1] Huang 2016 cites Kim 2015 doi | Table 8, p. 9, row 19 report | |
| -71.1 kJ/mol-atom ± 3.3 | CeSi | 298.15 | unspecified | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 30 report | ||
| -71.1 kJ/mol-atom | CeSi | 298.15 | unspecified | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 31 report | ||
| -70.5 kJ/mol-atom | CeSi | 298.15 | unspecified | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 32 report | ||
| -70.082 kJ/mol-atom | CeSi | 298.15 | unspecified | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 34 report | ||
| -70 kJ/mol-atom | CeSi | 298.15 | unspecified | Ce–Si | [1] Huang 2016 | Table 8, p. 9, row 33 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 |
|---|---|---|---|---|---|---|---|---|
| -71.1 | kJ/mol-atom | 3.3 | 0.05 | 3.2 (solution_reaction_calorimetry, calibrated) | 3.3 | |||
| -71.1 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -70.5 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -70.082 | kJ/mol-atom | 5.000e-4 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -70 | kJ/mol-atom | 0.05 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -71.1 | kJ/mol-atom | 3.3 | 0.05 | 3.5 (unknown, calibrated) | 3.5 | |||
| -71.1 | kJ/mol-atom | 0.05 | 3.5 (unknown, calibrated) | 3.5 | ||||
| -70.5 | kJ/mol-atom | 0.05 | 3.5 (unknown, calibrated) | 3.5 | ||||
| -70.082 | kJ/mol-atom | 5.000e-4 | 3.5 (unknown, calibrated) | 3.5 | ||||
| -70 | kJ/mol-atom | 0.05 | 3.5 (unknown, calibrated) | 3.5 |
DFT formation energies
Lowest-energy entries at this composition. Materials Project and OQMD use different energy references and are never averaged. 1 eV/atom = 96.485 kJ/mol-atom.
| Source | Entry | kJ/mol-atom | eV/atom | Space group | E above hull (kJ/mol-atom) | E above hull (eV/atom) | Theoretical |
|---|---|---|---|---|---|---|---|
| Materials Project | mp-aaaabfgd | -59.9 | -0.620819 | Pnma | 0 | 0 | no |
| OQMD | oqmd-18278 | -69.324 | -0.718497 | Pnma | 0 | 0 | no |
DFT sources: A. Jain et al., Commentary: The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002. doi:10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501-1509; S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010. doi:10.1007/s11837-013-0755-4 (CC BY 4.0);
Sources
- Dandan Huang, Shuhong Liu, Ying Tang, Yong Du, Philip Nash, Bo Sundman, Experimental investigation and thermodynamic modeling of the Ce-Si system, Thermochimica Acta 646, 49-58 (2016). doi:10.1016/j.tca.2016.11.003