| http://www.w3.org/ns/prov#value | - talates, titanates, copper stannate, tungsten oxide, molybdenum oxide, titanium oxide, vanadium oxide, niobium oxide, cerium oxide, MnO, NiO, CoO, and other metal oxides of the formula MO, wherein M represents a metal ion, metal oxides of the formula M2 O3, such as Cr2 O3, Fe2 O3, Y2 O3, Yb2 O3, Ti2 O3, and Mn2 O3, metal oxides of the formula MO2, such as TiO2, ThO2, and CrO2, metal oxides of the
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