1. Syktyvkar State University, 55 Oktyabrsky Avenue, Syktyvkar 167001, Russia
2. Saint Petersburg State University, 7/9 University Emb., St. Petersburg 199034, Russia
3. Institute of Chemistry of the Komi Science Center UB RAS, 48 Pervomaiskaya Str., Syktyvkar 167982, Russia
4. Osipyan Institute of Solid State Physics RAS, Chernogolovka 142432, Moscow District, Russia
5. Institute of Physics and Mathematics of the Komi Science Center UB RAS, 4 Oplesnina Str., Syktyvkar 167982, Russia
6. Institute of Geology of the Komi Science Center UB RAS, 48 Pervomaiskaya Str., Syktyvkar 167982, Russia
7. National Research Center, Kurchatov Institute, 1 Akad. Kurchatova Sq., Moscow 123182, Russia