1. Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany
2. European Synchrotron Radiation Facility, 38000 Grenoble, France
3. Department of Earth and Space Science, University of Washington, Seattle, Washington 98195, United States
4. Institute of Geochemistry and Petrology, ETH Zürich, 8092 Zürich, Switzerland
5. Bayerisches Geoinstitut, University of Bayreuth, 95440 Bayreuth, Germany