| Property | ThO2 | UO2 |
| Powder bulk density (g∙cm−3) | 0.8 - 1.2 (0.85) | >0.625 (1.8) |
| BET Specific surface area (m2∙g−1) | 3.5 - 4.5 | 3.5 - 8.0 |
| Average particle size (µm) | 0.8 - 1.5 | 5 - 15 |
| O: M ratio (M; Th or U) | 2.00 | 2.00 - 2.15 |
| Sinterability above 90% of TD | Sinterable | Sinterable |