The electronic structure of KMnO 4 investigated by resonant photoemission

The valence band of potassium permanganate (KMnO 4 ) was investigated by means of resonant photo- emission spectroscopy (ResPES) at the Mn2p, Mn3p and O1s edge. These data confirm the previous conclusions of a strong deviation from a purely ionic charge distribution in this compound. The ResPES data are in agreement with previous results about the character of the individual valence band states. A simple cluster model is used to explain qualitatively the di⁄erent structures seen in the valence band spectra and their dependence on the photon energy.