Crystal field in rare-earth fluorides—I. Molecular orbital calculation of PrF3 parameters |
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Authors: | D J Newman M M Curtis |
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Institution: | Department of Physics, Queen Mary College, London, E.1, England Department of Theoretical Physics, Oxford, England |
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Abstract: | Crystal field parameters have been calculated, using ab initio LCAO-MO theory, for the ion pair Pr3+—F− at five metal ligand distances appropriate to Pr3+:LaF3. The parameters are found to be twice as large as in PrCl3, but with only half the distance dependence. In the absence of precise Pr3+:LaF3 experimental parameters only qualitative agreement with experiment can be recorded. However, very good numerical agreement is obtained with the experimental covalency parameters for Yb3+:CaF2, which provides a check on the methods adopted for calculating energy denominators. |
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