The xenonium ion, XeH , is an onium compound, consisting of protonated xenon. Although the existence of the xenonium salts has not been proven, the isolated XeH ion is known. Salts of the fluoroxenonium ion, XeF , are known to exist, for instance fluoroxenonium pentafluoroplatinate (XeFPtF5), more commonly known as xenon hexafluoroplatinate.
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