One of the complex problems of thermodynamics of condensed media is the theoretical calculation of thermophysical properties, in particular, temperature dependences of heat capacities and coefficients of linear thermal expansion. For example, the theory of heat capacity is based on the well-known phonon models of Einstein and Debye (as well as their modifications), but they cannot explain a number of features: the increase in heat capacity with increasing temperature for many solids, describe jumps on curves (structural transitions), peaks and pits (aggregate, magnetic and other transformations).