Figure 43.

Oxygen K-edge of MnO, LiMnO₂, LiMn₂O₄, Li₂MnO₃. The 3d⁵ oxide MnO contains impurities from Mn³⁺ visible in the intensity before 529 eV. The 3d⁴ oxide LiMnO₂ has a broad 3d part due to a combination of the octahedral crystal field, exchange, and the Jahn–Teller distortion. The 3d³ oxide Li₂MnO₃ has a first peak related to a combination of spin-up e_g and spin-down t_2g states. LiMn₂O₄ is a mixed valence Mn³⁺/Mn⁴⁺ oxide, and in the first approximation its 3d part is a combination of the spectra of Mn³⁺ and Mn⁴⁺ sites.