Uranyl fluoride
Chemical compound
From Wikipedia, the free encyclopedia
Uranyl fluoride is the inorganic compound with the formula UO2F2. It is most notable as a contaminant in the production of uranium tetrafluoride.[3]
| |
| Names | |
|---|---|
| IUPAC name
Uranium(VI) difluoride dioxide | |
Other names
| |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.033.529 |
| EC Number |
|
PubChem CID |
|
CompTox Dashboard (EPA) |
|
| |
| |
| Properties | |
| UO2F2 | |
| Molar mass | 308.024 g·mol−1 |
| Appearance | yellow solid[1] |
| Density | 6.37 g/cm3[2] |
| very soluble | |
| Hazards | |
| GHS labelling: | |
   | |
| Danger | |
| H300, H330, H373, H411 | |
| Related compounds | |
Related compounds |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
As shown by X-ray crystallography, the uranyl centers UO2+2 are surrounded by six fluoride ligands F−.[4]
Synthesis
It is formed in the hydrolysis of uranium hexafluoride (UF6):
- UF6 + 2 H2O → UO2F2 + 4 HF
It can also be formed in the hydrofluorination of uranium trioxide (UO3):
- UO3 + 2 HF → UO2F2 + H2O[5]
Physical properties
This salt is very soluble in water as well as hygroscopic.[1] It changes in color from brilliant orange to yellow upon hydration. Starting around 300 °C, hydrolysis by the water vapor in air becomes significant, resulting in HF fumes.[citation needed]
