What is "xenon hexafluoroplatinate"

n. (context chemistry English) The first compound of an inert gas to be prepared; it seems to have the formula XePtF₆, but its structure is ambiguous, and may be a mixture.

Xenon hexafluoroplatinate is the product of the reaction of platinum hexafluoride and xenon, in an experiment that proved the chemical reactivity of the noble gases. This experiment was performed by Neil Bartlett at the University of British Columbia, who formulated the product as "Xe[PtF]", although subsequent work suggests that Bartlett's product was probably a mixture and did not in fact contain this specific salt.