1. Institute of Geochemistry, Mineralogy and Mineral Resources; Faculty of Science of Charles University in Prague; Albertov 6 128 43 Prague 2 Czech Republic
2. Academy of Fine Arts in Prague; ALMA laboratory; U Akademie 4 170 22 Prague 7 Czech Republic
3. Geoscientific Collections; Technische Universität Bergakademie Freiberg; Akademiestraße 6 09599 Freiberg Germany
4. Institute of Inorganic Chemistry of the AS CR, v.v.i.; ALMA laboratory; Husinec-Řež 1001 250 68 Řež Czech Republic