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 .

Preparation Caesium heptafluoroxenate can be prepared by dissolving caesium fluoride in liquid xenon hexafluoride:

Properties Caesium heptafluoroxenate is a yellow solid that is stable at room temperature. It is a very strong oxidizer. The compound decomposes at 50 °C to produce caesium octafluoroxenate:

Uses Caesium heptafluoroxenate is used to isolate xenon hexafluoride from a reaction mixture.

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