K₂O, CaO, Sc₂O₃, TiO₂, V₂O₅, CrO₃, Mn₂O₇, FeO, Fe₂O₃, CoO, Co₂O₃, NiO, Ni₂O₃, CuO, ZnO, Ga₂O₃, GeO₂, As₂O₅, SeO₃, Br₂O₇
K₂O, CaO, Sc₂O₃, TiO₂, V₂O₅, CrO₃, Mn₂O₇, FeO, Fe₂O₃, CoO, Co₂O₃, NiO, Ni₂O₃, CuO, ZnO, Ga₂O₃, GeO₂, As₂O₅, SeO₃, Br₂O₇