DIPOLE STRUCTURE MODEL OF MICA CRYSTALS. Metsik M.S., Novikov G.K. University of Irkutsk,Russia.

The new structural and energetic basic of the model of mica crystals is the presense of ionic K and OH sublattice in matrix of covalent bound up atoms of Si, Al, Mg, O. These atoms form plane element packets.

It is supposed that ions K and OH form the system of packet electrical dipoles creating force connections between packets. These forces are on the order of magnitude lower than the ones acting inside of packets.

Consequently kinds of mica are the typical inorganic polimerides with double nature of force connections covalent force is in packets and vandervaals one is between packets.

The model well explains great anisotropy of mechanical properties along two crystallographic directions and perfect crystal cleavage along (001) plane it allows to calculate of energy connection between packets and etc.In can also explain powerful coronoelectret effect with the voltage =4 Kv relaxing during [[tau]]>100 days discovered by us. That effect is conditioned by the capture of charge carriers in equilibrium vacancies of ionic sublattice with energies 0,2 eV and 0,75 eV. These values coincide with the calculated ones according to structural data of crystal energy diagramms.