The Multipole Model of Ionic Crystals

7) From a) and (3) the electric field at any lattice point is calculated. Then [Pg.12]

Summarizing the use of NQR spectroscopy in the determination of chemical bonding and of charge distribution in ionic solids one can say [Pg.13]

Under the assumption of the existence of ideal ionic crystals, built up from point charges and point multipoles, the NQR spectrum is completely determined by the crystal field of the electric multipoles. The experimental results of NQR can be explained within the frame of this model. Refinements of the model, such as the dependence of multipole polarizabilities upon the crystal field or the influence of overlapping of the electron clouds, are not yet understood quantitatively. [Pg.13]

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