2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85637Using a method of a Raman effect of light the heterodiffusion in molecular crystals is investigated by the example of p-dichlorobenzene in a p-dibromobenzene. The installation diagram and a procedure of a determination of diffusivities using this method is given. Changes of diffusivities in a cut of a crystal perpendicularly to a direction of diffusion are found. Obtained values of diffusivities are in good agreement with those obtained by other methods.OpticsInstrumentation and Detectorstext