Speculations on anomalous chemical states of Ti ions in FeTiO3 observed by high-resolution X-ray Kβ emission spectra

▶ High-resolution Ti Kβ emission spectra of MTiO3 (M = Ti, Mn, Fe, Co, or Ni) compounds. ▶ Origin of anomalous valence states of Ti ions in FeTiO3 observed by XES. ▶ Theoretical Ti Kβ spectra assuming the [Ti3+O6]9− or [Ti4+O6]8− cluster. ▶ M2+→Ti4+ inter-valence charge transfer induced by the core-hole states.