1. Syktyvkar State University, Oktjabrskij prospect, 55, Syktyvkar, Komi Republic 167001, Russia
2. Department of Crystallography, Institute of Earth Sciences, Saint-Petersburg State University, University Emb. 7/9, St. Petersburg 199034, Russia
3. Institute of Chemistry of the Komi Science Center UB RAS, Pervomaiskaya st. 48, Syktyvkar, Komi Republic 167982, Russia
4. Institute of Geology of the Komi Science Center UB RAS, Pervomaiskaya st. 54, Syktyvkar, Komi Republic 167982, Russia