The Electric Field Gradient Tensor
The nuclear portion of the electric quadrupole interaction, along with its application to nuclear physics, was described by Professor Hafemeister in the previous chapter. The importance of the nuclear part, for the purposes of this chapter, is that the extra-nuclear portion, the electric field gradient (EFG) tensor, cannot be extracted from experimental data without prior knowledge of certain nuclear spins and moments. The required information, if known, may be easily located in the Mössbauer Effect Data Index , and the use of such information to relate observed splittings to the EFG tensor is illustrated in this chapter. In addition, the following sections describe the prediction of the EFG tensor for an assumed molecular crystal model, special techniques and hints, and the utility of EFG information.
KeywordsValence Electron Quadrupole Splitting Electric Field Gradient Asymmetry Parameter Ligand Contribution
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