Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula .
Caesium heptafluoroxenate can be prepared by dissolving xenon hexafluoride in molten caesium fluoride:[1]
Caesium heptafluoroxenate is a yellow solid that is stable at room temperature. It is very strong oxidizer. The compound decomposes at 50 °C to produce caesium octofluoroxenate:[2]
Caesium heptafluoroxenate is used to isolate xenon hexafluoride from a reaction mixture.