1) Xenon compound 
In chemistry, perxenates are salts of the yellow xenon-containing anion {chem|XeO|6|4-}. This anion has octahedral molecular geometry, as determined by Raman spectroscopy, having O–Xe–O bond angles varying between 87° and 93°. The Xe–O bond length was determined by X-ray crystallography to be 1.875 Å. ==Synthesis== Perxenates are synthesi...