The coefficient of transverse deformation and nonlinear forces of interatomic interaction

The interrelation between the Grüneisen parameter and the Poisson ratio (the coefficient of transverse deformation) of crystalline and glassy solids is considered. It is shown that the Poisson's ratio μ is single-valued for the function of the Gruneisen parameter γD. Comparison of the results of calculations shows an unambiguous relationship between the harmonious and anharmonic γD values, which is not typical for the theory of elastici- ty