Xenon octafluoride is a chemical compound of xenon and fluorine with the chemical formula . This is still a hypothetical compound. is predicted to be unstable even under pressures reaching 200 GPa.
The compound was initially predicted in 1963 by Linus PaulingâÂÂamong other noble gas compounds but which, unlike other xenon fluorides, could probably never be synthesized. This appears to be due to the steric hindrance of the fluorine atoms around the xenon atom. However, scientists continue to try to synthesize it.
The formation of xenon octafluoride has been calculated to be endothermic:
The doubly charged anion octafluoroxenate XeF in which the oxidation number of xenon is only VI, is stable in salts.