I.N. Aliev - Dr.Sc. (Phys.-Math.), Professor, Bauman Moscow State University (Moscow). E-mail: alievprof@yandex.ru P.P. Poluektov - Dr.Sc. (Phys.-Math.), Professor, Bochvara Russian Scientific Research Institute of Inorganic Materials (Moscow). E-mail: ppp@bochvar.ru