Sebaliknya, banyak oktafluorida anionik diketahui, seperti oktafluorozirkonat(IV) ([ZrF8]4-  ), oktafluorontatalat(V) ( [TaF8]3- ), oktafluoroniobat(V) ([NbF8]3-  ), [1] octafluoromolybdate(VI) ( [MoF8]2- ), [1] oktafluorotungstate(VI) ( [WF8]2- ), [1] octafluororhenate(VII) ( [ReF8]- ), [1] oktafluoroiodat(VII) ( [IF8]- ), oktafluoroiridat(VII) ( [IrF8]- ), [2] dan octafluoroxenate(VI) ( XeF8]2- ) anion.