Rayleigh light scattering in molecular crystals of succinonitrile and trimethylacetonitrile

Abstract

Abstract Two representatives of molecular crystals exhibiting plastic phase : succinonitrile NCCH2CH2CN and trimethylacetonitrile |CH3|3CCN were studied. For these crystals the horizontally and vertically polarized components of the scattered radiation were measured in the temperature range from the plastic phase to liquid, and the depolarization degrees were determined. The isotropic component VV was also measured as a function of temperature changing from liquid to plastic phase. In both phases the squares of effective anisotropy of optical polarizability were found from the measurements of the anisotropic component HV.