1. Solid State Chemical Crystallography; Institute of Inorganic Chemistry and Crystallography; University of Bremen; Leobener Strasse 7 /NW2 28359 Bremen Germany
2. MAPEX Center for Materials and Processes; University of Bremen; Bibliothekstraße 1 28359 Bremen Germany
3. Chemical and Engineering Materials Division; Oak Ridge National Laboratory; 37831 Oak Ridge Tennessee USA