Uranyl fluoride is the inorganic compound with the formula . It is most notable as a contaminant in the production of uranium tetrafluoride.
As shown by X-ray crystallography, the uranyl centers are surrounded by six fluoride ligands .
Synthesis It is formed in the hydrolysis of uranium hexafluoride ():
It can also be formed in the hydrofluorination of uranium trioxide ():
Physical properties This salt is very soluble in water as well as hygroscopic. 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.
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