1. Inorganic Chemistry Department Taras Shevchenko National University of Kyiv 12, Lva Tolstogo St. 01601 Kyiv Ukraine
2. STC “Institute for Single Crystals” National Academy of Science of Ukraine Nauky ave. 60 61001 Kharkiv Ukraine
3. V.N. Karazin Kharkiv National University 4 Svobody sq. Kharkiv 61122 Ukraine
4. Department of chemistry of lanthanides A. V. Bogatsky Physico-chemical Institute of the National Academy of Sciences of Ukraine 86 Lustdorfska doroga 65080 Odesa Ukraine
5. Faculty of Chemistry University of Wroclaw 14 F. Joliot-Curie Str. 50-383 Wroclaw Poland
6. Physics Department and CICECO-Aveiro Institute of Materials University of Aveiro Campus Universitario de Santiago 3810-193 Aveiro Portugal
7. Departamento de Quımica Fundamental Universidade Federal de Pernambuco Cidade Universitaria 50740-560 Recife Brazil