"l and an alkaline earth metal, such as ammonium chlorate, sodium chlorate, potassium chlorate, magnesium chlorate and barium chlorate; and perchlorates of ammonium, an alkali metal and an alkaline earth metal, such as ammonium perchlorate, sodium perchlorate, potassium perchlorate, magnesium perchlorate and barium perchlorate; and metal oxides such as CuO, Cu2 O, Co2 O3, CoO, Co3 O4, Fe2 O3, FeO," . . . .