1. Institute for Mineralogy University of Münster Münster Germany
2. Institute for Geophysics University of Münster Münster Germany
3. CNRS INRAE Centrale Lille UMR 8207 ‐ UMET ‐ Unité Matériaux et Transformations University of Lille Lille France
4. Now at Department of Geology and Geophysics University of Utah Salt Lake City UT USA
5. Deutsches Elektronen‐Synchrotron (DESY) Hamburg Germany
6. Now at European Synchrotron Radiation Facility Grenoble France