Abstract
Electron energy loss spectroscopy installed in a transmission electron microscope was used to investigate the electronic states of LiMnVO 4. The Mn- L multiplet structure of LiMnVO 4 and the typical manganese oxides clearly revealed that the manganese in LiMnVO 4 is divalent. The Mn- L spectrum showed a characteristic multiplet structure in tetrahedrally coordinated- d 0 oxides, revealing that vanadium is pentavalent. The O- K spectrum was compared to that of LiMnPO 4, and showed that the lowest unoccupied states of LiMnVO 4 have mainly vanadium 3 d character and that the bonding between vanadium and oxygen in LiMnVO 4 is more ionic than phosphorus and oxygen in LiMnPO 4.
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