An XPS Study of Electronic Structure of Potassium Molybdenum Bronze

The electronic structures of purple bronze K_0.9Mo₆O₁₇ and blue bronze K_0.3MoO₃ were studied by XPS.According to the Mo3d core level spectra Mo⁶⁺ ,Mo⁵⁺ and Mo⁴⁺ ions are found in the purple bronze and Mo⁶⁺ ,Mo⁵⁺ in the blue bronze.The average of their valence states is 5.52 and 5.73 respectively.By comparison of their valence band and core level spectra,we think it is very sensitive that the electronic structure of there molybdenum bronze is affacted by stoichiometric composition of potassium ions.