Halide electric dipole polarizabilities

Electric Dipole Polarizabilities of Alkali Halide Dimers... 

J., "Electric Dipole Polarizabilities of Alkali Halide Dimers", presented at 181st National ACS Meeting, Atlanta, 1981. 

TABLE 7. Average Electric Dipole Polarizabilities for Ground State Organic Halides (in Units of 10 cm )... 

Dipolar ions like CN and OH can be incorporated into solids like NaCl and KCl. Several small dopant ions like Cu and Li ions get stabilized in off-centre positions (slightly away from the lattice positions) in host lattices like KCl, giving rise to dipoles. These dipoles, which are present in the field of the crystal potential, are both polarizable and orientable in an external field, hence the name paraelectric impurities. Molecular ions like SJ, SeJ, Nf and O J can also be incorporated into alkali halides. Their optical spectra and relaxation behaviour are of diagnostic value in studying the host lattices. These impurities are characterized by an electric dipole vector and an elastic dipole tensor. The dipole moments and the orientation direction of a variety of paraelectric impurities have been studied in recent years. The reorientation movements may be classical or involve quantum-mechanical tunnelling. 

As we have seen in the preceding chapter, the properties of the gaseous monomeric alkali metal halides are in very good agreement with those predicted by the polarizable ion model. Their experimental dipole moments are all very large, ranging from 6.28 D in T.iF to 11.69 D in Csl. The electric dipole moment of LiH, 5.88 D, is nearly as large as... 

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