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

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

scandium(III) cation | scandium(III) triflate (1 eq) | scandium(III) oxalate hydrate (2 eq) 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)