Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula . It consists of caesium cations and heptafluoroxenate(VI) anions .
Caesium heptafluoroxenate can be prepared by dissolving caesium fluoride in liquid xenon hexafluoride:
Caesium heptafluoroxenate is a yellow solid that is stable at room temperature. It is a very strong oxidizer. The compound decomposes at 50 ðC to produce caesium octofluoroxenate:
Caesium heptafluoroxenate is used to isolate xenon hexafluoride from a reaction mixture.