1. Department of Chemistry and Center of Material Science
2. Philipps University
3. 35032 Marburg
4. Germany
5. Institute of Inorganic Chemistry
6. TU Bergakademie Freiberg
7. 09599 Freiberg
8. Max Planck Institute for Solid State Research
9. 70569 Stuttgart
10. Condensed Matter Physics and Materials Science Department
11. Brookhaven National Laboratory
12. New York 11973
13. USA