| Compound | Uranium Trioxide |
| Synonyms | Uranium(VI) oxide |
| Formula | UO3 |
| Molecular Formula | O3U |
| Molecular Weight | 286.027 |
| CAS RN: | 1344-58-7 |
| Properties | -100 mesh; has six forms: α is hexagonal brown, β is orange monoclinic, γ is bright yellow rhomb, δ is red cub, ε is brick red tricl, ηis rhomb; UO3 can be obtained by thermal decomposition of uranyl compounds, e.g, carbonates, oxalates nitrates [KIR83] [CER91] |
| Solubility | Insoluble H2O; soluble acids [MER06] |
| Density, g/cm3: | 7,29 g/cm3 |
| Melting point, °C | Decomposes |
| Boiling point, °C | Decomposes |
