<Tr> <Td_colspan="2"> Infobox references </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> </Tr> <P> Hexafluorophosphate is an anion with chemical formula of PF . It is an octahedral species . It imparts no color to its salts . PF is isoelectronic with sulfur hexafluoride, SF, and the hexafluorosilicate dianion, SiF, and fluoroantimonate SbF . Being poorly nucleophilic, hexafluorophosphate is classified as a non-coordinating anion . </P> <P> Hexafluorophosphate salts can be prepared by the reaction of phosphorus pentachloride and alkali or ammonium halide in a solution of hydrofluoric acid: </P>

What is the electron domain geometry about phosphorus in the hexafluorophosphate anion (pf 6 ​ − )