1. Chemische Metallkunde Max-Planck-Institut für Chemische Physik fester Stoffe Nöthnirtzer Straße 40 01187 Dresden Germany
2. Department of Inorganic Chemistry Ivan Franko Lviv National University Kyriylz i Mefodia St. 5 79005 Lviv Ukraine
3. Centre for Analysis and Synthesis, Department of Chemistry Lund University Box 124 221 00 Lund Sweden