1. Bayerisches Geoinstitut, University of Bayreuth, 95440 Bayreuth, Germany
2. Earth and Planetary Laboratory, Carnegie Institute for Science, Washington, DC 20015-1305, USA
3. Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
4. Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
5. Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo, Hyogo 689-5198, Japan
6. School of Earth and Space Sciences, Peking University, Beijing 100871, China