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Heat formation of selected oxides; a more negative value indicates more energetically favorable for the formation of the oxide [17]
| Material Class | Compound | Heat of Formation (kJ/mol) |
|---|---|---|
| Rare Earth (Lanthanide) Oxides | Er2O3 | − 1898 |
| Lu2O3 | − 1878 | |
| Ce2O3 | − 1896 | |
| Al2O3 | − 1675 | |
| TiO2 | − 944 | |
| Quartz | SiO2 | − 911 |
| Silica (fused quartz) | SiO2 | − 903.5 |
