1. Chair of Solid-State and Quantum Chemistry
2. Institute of Inorganic Chemistry
3. RWTH Aachen University
4. 52056 Aachen
5. Germany
6. Department of Materials and Environment Chemistry
7. Stockholm University
8. 106 91 Stockholm
9. Sweden
10. Faculty of Chemistry
11. Jagiellonian University
12. 30-387 Krakow
13. Poland