1. Department of ChemistryUniversity of Munich (LMU) Butenandtstrasse 5–13 81377 Munich Germany
2. Institute of Inorganic Chemistry and Jülich-Aachen Research Alliance (JARA HPC)RWTH Aachen University 52056 Aachen Germany
3. Institute for Mineralogy, Crystallography and Materials ScienceLeipzig University Scharnhorststrasse 20 04275 Leipzig Germany
4. ESRF-The European Synchrotron 71 avenue des Martyrs 38000 Grenoble France