Abstract
Electron charge density distribution of CsLiCrO 4 at 550 K in the high temperature orthorhombic phase has been obtained by analyzing the synchrotron radiation X-ray powder diffraction data using the MEM (maximum entropy method)/Rietveld method. Although the temperature factors of oxygen atoms are relatively large, definite evidence which shows the oxygen atoms to be in disorder state has not been obtained. It is found from the charge-density distribution that strong covalent bonding is formed between Cr and O atoms in CrO 4 tetrahedra, whereas Li atoms are regarded to be almost ionic as clear bonding electron distribution is not seen between Li and O atoms.
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