1. Department of Inorganic Chemistry II, Materials and Catalysis, University of Ulm, Albert‐Einstein‐Allee 11, 89069 Ulm, Germany, Fax: (internat.) + 49‐(0)731‐502‐3039
2. Sektion Röntgen‐ und Elektronenbeugung, University of Ulm, Albert‐Einstein‐Allee 11, 89069 Ulm, Germany