W. Kucharczyk et al., The effective bond charge in alkali halides - another manifestation of thecrystals ionicity, J PHYS CH S, 62(4), 2001, pp. 761-765
The effective bond charge q(eff), as determined from experimental values of
the third-order optical susceptibility in alkali halides, is analyzed. The
correlations of q(eff) with the ratio of the cation to anion radius, latti
ce constant and Szigeti effective charge are taken into account. The relati
onships between q(eff) and other parameters describing the ionicity show th
at the magnitude of q(eff) can be considered as one more parameter related
to the ionicity of the crystals. (C) 2001 Elsevier Science Ltd. All rights
reserved.