1. Physics Department M. V. Lomonosov Moscow State University Leninskie Gory Moscow 119991 Russia
2. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences 31 Leninsky Prospect Moscow 119991 Russia
3. Scientific Practical Materials Research Centre of the National Academy of Sciences of Belarus 19 P.Brovki str. 220072 Minsk Republic of Belarus