1. Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
2. Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, 182 21 Prague, Czech Republic
3. Faculty of Sciences, Charles University, Albertov 6, 128 00 Prague, Czech Republic
4. Department of Inorganic Technology, University of Chemistry and Technology, Prague, Technická 5, 166 28 Prague, Czech Republic