Caesium heptafluoroxenate is an inorganic compound of caesium, and fluorine, and xenon with the chemical formula CsXeF7.

Caesium heptafluoroxenate can be prepared by dissolving caesium fluoride in liquid xenon hexafluoride:[1] 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 octofluoroxenate:[2] Caesium heptafluoroxenate is used to isolate xenon hexafluoride from a reaction mixture.