Interaction of self-consistent phonons and librons in a microscopic theory of mesogenous molecular crystals

The second order of the self-consistent field method in the theory of mesogenous molecular crystals is considered. It is shown that the interaction of seIf-consistent phonons and librons pIays an important part. This must be taken into account in calculations for the correct description of the contributions of translational and orientational anharmonieity to the development of dynamic instability and for establishing the conditions of transition of a molecular lattice to the mesophase.