What is "perxenate"

n. (context inorganic chemistry English) The anion XeO₆^4- formally derived from perxenic acid; any salt containing this anion.

In chemistry, perxenates are salts of the yellow xenon-containing anion . 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.