Study of low-frequency polarized spectra of a mixed para-dibromobenzene-para-bromochlorobenzene crystal

Polarization studies of low-frequency Raman spectra of a mixed (1 : 1) para -dibromobenzene-para-bromochlorobenzene crystal are performed. The spectrum of the mixed crystal is similar to the spectra of its components and also exhibits a number of additional low-intensity lines. The experimental resul ts are interpreted using calculations of mixed crystals by the methods of a tom-atom potentials and of Dean. It is found that the experimental results better agree with calculations when the disordered distribution of-para-bro mochlorobenzene molecules over para-positions is taken into account (C) 200 0 MAIK "Nauka/Interperiodica".