Pd4Yb3: enthalpy of formation
5 accepted literature formation-enthalpy value(s) (experimental 1, model 3, DFT 1); experimental median -73 kJ/mol-atom (n = 1); OQMD -81.152 kJ/mol-atom (oqmd-1799704).
Systems: Pd–Yb
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -73 kJ/mol-atom ± 3 | Pd4Yb3 | 1029.5 | experimental | KEML/KEMS* | Pd–Yb | [1] Kardellass 2020 cites Ciccioli 2016 doi | Table 3, p. 5, row 42 report | |
| -92.562 kJ/mol-atom | Pd4Yb3 | 298.15 | model | Prediction | Pd–Yb | [1] Kardellass 2020 cites De 2014 | Table 3, p. 5, row 41 report | |
| -77.2289 kJ/mol-atom | Pd4Yb3 | 298.15 | model | Optimization R-K | Pd–Yb | [1] Kardellass 2020 | Table 3, p. 5, row 39 report | |
| -71.5898 kJ/mol-atom | Pd4Yb3 | 298.15 | model | Optimization K | Pd–Yb | [1] Kardellass 2020 | Table 3, p. 5, row 40 report | |
| -81.181 kJ/mol-atom | Pd4Yb3 | 298.15 | DFT | Ab-initio | Pd–Yb | [1] Kardellass 2020 | Table 3, p. 5, row 43 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 |
|---|---|---|---|---|---|---|---|---|
| -73 | kJ/mol-atom | 3 | 5.000e-5 | 4.2 (kems_vapour, calibrated) | 4.2 | |||
| -92.562 | kJ/mol-atom | 5.000e-6 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -77.2289 | kJ/mol-atom | 5.000e-6 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -71.5898 | kJ/mol-atom | 5.000e-6 | 3.9 (model_calculated, calibrated) | 3.9 | ||||
| -81.181 | kJ/mol-atom | 5.000e-4 | 8.395 (dft, calibrated) | 8.395 |
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 |
|---|---|---|---|---|---|---|---|
| OQMD | oqmd-1799704 | -81.152 | -0.841081 | R-3 | 1.2009 | 0.0124 | yes |
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
- Said Kardellass, Colette Servant, Isabelle Drouelle, Fatima Zahra Chrifi-Alaoui, Mohamed Idbenali, Alyen Abahazem et al., Calphad-type assessment of the Pd-Yb binary system supported by first-principles calculations – Part II: Results, Materials Today: Proceedings 24, 140-150 (2020). doi:10.1016/j.matpr.2019.08.196