1. Materials Physics and Technology at Extreme Conditions, Laboratory of Crystallography, Universität Bayreuth, D-95440 Bayreuth, Germany
2. Bayerisches Geoinstitut, Universität Bayreuth, D-95440 Bayreuth, Germany
3. Department of Physics, Technical University of Denmark, 2800 Lyngby, Denmark
4. Institut für Mineralogie, University of Münster, D-48149 Münster, Germany
5. ESRF—The European Synchrotron, CS 40220, 38043 Grenoble Cedex 9, France
6. Deutsches Elektronen-Synchrotron (DESY), D-22607 Hamburg, Germany