(chemistry) The univalent anion PtF₆⁻ prepared by reacting platinum hexafluoride with certain metals or other elements.

plural of hexafluoroplatinate

(inorganic chemistry) A compound, (O₂)⁺(PtF₆)⁻, important historically as a precursor of the first noble gas compound.

(chemistry) 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.