Thorium oxyfluoride is an inorganic compound of thorium metal, fluorine, and oxygen with the chemical formula .
Synthesis Thorium oxyfluoride can be prepared from partial hydrolysis of thorium tetrafluoride in moist air at elevated temperatures, about 1000 °C.
Reaction of thorium tetrafluoride with thorium dioxide at 600 °C:
Physical properties The compound forms a white, insoluble amorphous powder.
Uses The compound is used as a protective coating on reflective surfaces.
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