1. A.V. Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics” of Russian Academy of Sciences, Moscow, Russia
2. Prokhorov General Physics Institute of Russian Academy of Sciences, Moscow, Russia
3. National Research Center “Kurchatov Institute”, Moscow, Russia
4. FLNR, JINR, Dubna, Russia
5. National Research Nuclear University MEPhI, Moscow, Russia
6. Dubna State University, Dubna, Russia
7. Ecole Polytechnique Fédérale de Lausanne, Centre Interdisciplinaire de Microscopie Electronique, Lausanne, Switzerland