Аннотация:Calculations of the effect of pressure on the equilibrium isotope fractionation in complex solids: silicates, calcite, rutille (oxygen isotopes) and the system diamond - calcite - graphite (carbon isotopes) have been undertaken on the basis of the previously developed approach. A number of different models of mineral vibrational spectra, Raman and IR spectroscopic data were used. The pressure-induced correction may be as great as 0.3-0.01 parts per thousand kbar-1 at temperatures 0-800-degrees-C in the systems of minerals with different crystal structure.