GIGANTIC LATTICES AND GIGANTIC NONCRYSTALLINE CLUSTERS IN GLASSES

The phenomenon of unusual light scattering observed earlier during exp osure of the bulk glasses As2S3 and GeS2 to polarized light with hupsi lon < E(g) which causes- optical anisotropy and gyrotropy in the sampl es is considered here as the structural diffraction. For the first tim e the formation of gigantic non-crystalline clusters (GNC) of the micr ometer size and gigantic lattices due to the GNC regular packing is es tablished. It is shown that the existence of a dynamic subsystem consi sting of soft atomic configurations in the form of three-centre bonds (TCB) in addition to the basic subsystem of rigid covalent bonds is a necessary condition for the creation of GNC which have collective TCB on their mobile boundaries.