1. SSI “Institute for Single Crystals”; National Academy of Sciences of Ukraine; Lenin Avenue 60 61001 Kharkov Ukraine
2. Shubnikov Institute of Crystallography; Russian Academy of Sciences; Lenin Avenue 59 119333 Moscow Russia
3. Lobachevsky State University of Nizhny Novgorod; Gagarin Avenue 23 603950 Nizhny Novgorod Russia