. . "These materials can be used separately or in mixtures with other absorbing oxides or in mixtures with other oxides such as tin oxide, germanium oxide, titanium oxide, aluminum oxide, zirconium oxide, zinc oxide, indium oxide, cadmium oxide, hafnium oxide, tungsten oxide, vanadium oxide, molybdenum oxide, iridium oxide, nickel oxide, tantalum oxide, strontium oxide, lead oxide, scandium oxide, gall" . . . .