1. Institute of Inorganic Chemistry and Crystallography, Faculty of Biology and Chemistry, University of Bremen, Leobener Straße 7, D-28359 Bremen, Germany
2. MAPEX Center for Materials and Processes, University of Bremen, Bibliothekstraße 1, D-28359 Bremen, Germany
3. Crystallography, Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, D-28359 Bremen, Germany
4. Faculty of Geosciences, University of Bremen, Klagenfurter Straße 2-4, D-28359 Bremen, Germany