1. Bayerisches Geoinstitut, University of Bayreuth, Universitätsstraße 30, Bayreuth95447, Germany
2. School of Earth Sciences, Zhejiang University, Hangzhou310058, China
3. Department of Earth Sciences, University of Oxford, OxfordOX1 3AN, U.K.
4. State Key Laboratory of Superhard Materials, Jilin University, Changchun130012, China
5. Center for High Pressure Science and Technology Advanced Research, Beijing100094, China
6. Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, Hamburg22607, Germany