1. Institute of Inorganic ChemistryUniversity of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
2. Department of Materials and Environmental ChemistryStockholm University Svante Arrhenius Väg 16 C 10691 Stockholm Sweden
3. Institute of Physical ChemistryUniversity of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
4. Institute of Theoretical ChemistryUniversity of Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
5. Max-Planck-Institute for Solid-State Research Heisenbergstrasse 1 70569 Stuttgart Germany