... oxide, magnesium oxide, tungsten oxide, copper oxide, iron oxide, samarium oxide, neodymium oxide, lanthanum oxide, yttrium oxide, ytterbium oxide, gadolinium oxide, lutetium oxide, terbium oxide, holmium oxide, europium oxide, thulium oxide, erbium oxide, bismuth oxide, praseodymium oxide, antimony oxide, vanadium oxide, nickel oxide ...