common sources of ion of yttrium(III) cation vs gold(III) cation

yttrium(III) cation gold(III) cation | common sources of ion

yttrium(III) cation | yttrium vanadate (1 eq) | yttrium(III) sulfate octahydrate (2 eq) | yttrium(III) phosphate (1 eq) | yttrium(III)nitrate tetrahydrate (1 eq) | yttrium(III) nitrate hexahydrate (1 eq) | tris(cyclopentadienyl)yttrium(III) (1 eq) gold(III) cation | gold(III) sulfide (2 eq)