1. Institute of Inorganic Chemistry; University of Regensburg; Universitätsstrasse 31 93040 Regensburg Germany
2. Institute of Inorganic Chemistry; Georg-August-University; Tammannstrasse 4 37077 Göttingen Germany
3. Otto-Schott-Institut für Materialforschung; Friedrich-Schiller-Universität Jena; Löbdergraben 32 07743 Jena Germany
4. Nikolaev Institute of Inorganic Chemistry SB RAS; Ak. Lavrentiev prosp. 3 630090 Novosibirsk Russia
5. Novosibirsk State University; Pirogova str. 2 630090 Novosibirsk Russia