On the critical displacement of excited kinetic units in liquids and glasses

Abstract

The critical displacement of an atom (a group of atoms) in inorganic glasses ∆ r m , which corresponds to the maximum of the interatomic attractive force, is calculated using available data on the surface tension and elastic constants. It is found that the critical atomic displacement ∆ r m is close in order of magnitude to the linear dimension of the activation volume of atomic excitation for glasses in the As-S and Ge-As-