Effective dielectric function of a multiphase heterogeneous system

A phenomenological description of the dielectric response of an effective m edium is proposed, which takes into account possible features of topology o f a statistical multiphase heterogeneous system. Using a three-component Si O2-KBr-air system as an example, it is shown that the generalized equation used for the description provides a substantial improvement of the agreemen t between the experimental and calculated frequency-dependent effective die lectric constants in the region of valence Si-O vibrations.