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Abstract Valence‐band and core‐level x‐ray photoelectron spectroscopy (XPS) of manganese and its oxides is reported and the valence‐band spectra are interpreted by various calculation models. The focus of this paper is on the valence band, which shows significant differences between the oxides of manganese in the formal oxidation states II, II/III, III, IV, VI and VII. The study reports the valence band for the metal and the following oxidized forms of the metal: MnO, Mn 3 O 4 , Mn 2 O 3 , MnO 2 , K 2 MnO 4 and KMnO 4 . The difference seen in the valence‐band region makes this region appropriate for the surface analysis of manganese compounds and complements the core region, which is often complicated by broad peaks with satellite features. The valence‐band region is interpreted by band structure and cluster calculations. It is shown that the differences between the observed spectra and band structure calculations for Mn 3 O 4 , Mn 2 O 3 and MnO 2 may be a result of the calculation method and not of the highly intense satellites. Copyright © 2002 John Wiley & Sons, Ltd.
Audi et al. (Fri,) studied this question.