Spectres de Diffusion Raman d'un Monocristal de CBr4 Monoclinique

The polarized Raman spectra of monoclinic CBr4 are interpreted in terms of pseudo-cubic site symmetry 42m. The large polarizability of Br atoms is responsible for the high intensity of the off-diagonal terms of total symmetric tensors. Dipole–dipole coupling gives, for the v3 mode, a quite different behaviour from that of the other internal modes.