Raman spectra of SnS2 and SnSe2

The first order Raman spectra of the Group IVa layer compounds SnS2 and SnSe2 are presented. The two Raman active modes of each compound have been identified and on the basis of their observed symmetry assigned in accord with group theoretical predictions. The SnSe2 spectrum is compared to the results of a previous investigation and poor agreement is obtained. The present results are also compared to spectra previously obtained from Group IVb dichalcogenides.