1. Universität Bielefeld, Universitätsstraße 25, D-33615 Bielefeld, Germany
2. M. V. Lomonosov Moscow State University, Department of Physical Chemistry, GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russian Federation
3. Institute of Inorganic Chemistry of the ASCR, v.v.i, CZ-250 68 Husinec-Řež, Czech Republic
4. Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
5. Materialchemie, Paris-Lodron Universität Salzburg, Hellbrunner Straße 34, A-5020 Salzburg, Austria