Raman intensities of sulphur α-S8

Abstract

On the basis of the available force fields for the S8 ring the vibrational Raman intensities of an α-S8 single crystal and of a randomly oriented polycrystalline sample are interpreted in the frame of the bond polarizability model. The whole set of Raman tensors of the S8-molecular ring and of the single crystal including relative signs are reported, as well as the polarizability parameters for the S–S bond. These magnitudes and the related Raman scattering coefficients are finally reported in an absolute scale by means of the optical refractivities of the crystal.