common sources of ion of iron(III) cation vs gold(I) cation

iron(III) cation gold(I) cation | common sources of ion

iron(III) cation | iron phosphide (3:1) (1 eq) | iron(III) sulfate hydrate (2 eq) | iron(III) phosphate tetrahydrate (1 eq) | iron(III) perchlorate hydrate (1 eq) | iron(III) oxalate hexahydrate (2 eq) | iron(III) nitrate nonahydrate (1 eq) | hemin (1 eq) | diironnonacarbonyl (1 eq) gold(I) cation | gold(I) sulfide (1 eq) | gold cyanide (1 eq) | gold(I) chloride (1 eq)