ANALYSIS OP THE MID-IR ELECTRONIC ABSORPTION SPECTRUM OF Fe2P2S6 AND Co2P2S6

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1988

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Ohio State University

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Single crystal FTIR spectra of $Fe_{2}P_{2}S_{6}, Co_{2}P_{2}S_{6}, Cd_{2}P_{2}S_{6}$, and $Mn_{2}P_{2}S_{6}$ were recorded at room temperature. The Pe2P2S6 and $Co_{2}P_{2}S_{6}$ spectra exhibit bands which can be assigned to electronic transitions between the trigonal field components of the ground electronic state. A point-charge crystal-field model was used to relate the trigonal field splitting to crystal field parameters $(D_{q} and C_{p})$ and to determine the relative energy of the trigonal field components. The FTIR spectrus of $Fe_{2}P_{2}S_{6}$ intercalated with pyridine was analyzed in terms of intercalation induced changes in the crystal-field parameters.

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Author Institution: Department of Chemistry, University of Michigan

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