Uranium Dioxide
![]() |
![]() |
uranium (IV) oxide
- Formula as commonly written: UO2
- Hill system formula: O2U1
- CAS registry number: [1344-57-6]
- Formula weight: 270.028
- Class: oxide
Synonyms
- uranium (IV) oxide
- uranium dioxide
- uranium oxide
- pitchblende
Physical properties
- Colour: dark brown
- Appearance: crystalline solid
- Melting point: 2827°C
- Boiling point:
- Density: 10970 kg m-3
Suppliers
Element analysis and oxidation numbers
For each compound, and where possible, a formal oxidation
number for each element is given, but the usefulness of this number is limited,
especially so for p-block elements in particular. Based upon that
oxidation number, an electronic configuration is also given but note that for
more exotic compounds you should view this as a guide only.
Element | % | Formal oxidation state | Formal electronic configuration |
11.85 | -2 | [He].2s2.2p6 | |
U | 88.15 | 4 | [Rn].5f2 |
Synthesis
Solid state structure
- Geometry of uranium:
- Prototypical structure:
![]() |
Isotope pattern
What follows is the calculated isotope pattern for the UO2 unit with the most intense ion set to 100%.
Formula: U1O2
mass %
266 0.0 |
267 0.7 |
268 0.0 |
269 0.0 |
270 100.0 |
271 0.1 |
272 0.4 |
HNO3
CAS # |
Formula |
Formula Weight |
|||
1344-57-6 |
|
270.07 |
|||
Color |
Specific Gravity |
Melting |
Boiling Point | ||
brn-blk,cub |
10.97 |
2827 |
…….. |
||
Solubility |
|||||
Cold Water |
Hot Water |
Other Reagents |