Fluidity and energy of delocalization of atom in silicate glasses

For multicomponent plate and lead silicate glasses energy of delocalization of atoms Δεe was calculated by experimental data on viscosity. It is shown that size Δεe remains constant in a rather wide range of temperatures in the area of vitrification. The received results are in satisfactory consent with calculation for a formula of model of the delocalized atoms with temperature of vitrification and share of fluctuation volume frozen at this temperature.