1. Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68 Husinec-Řež, Czech Republic
2. Faculty of Environment, Jan Evangelista Purkyně University, Králova Výšina 3132/7, 400 96 Ústí nad Labem, Czech Republic
3. Charles University, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
4. Institute of Physics of the Czech Academy of Sciences, 182 21 Praha, Czech Republic