1. Bayerisches GeoinstitutUniversity of Bayreuth Bayreuth Germany
2. State Key Laboratory of Superhard MaterialsJilin University Changchun China
3. Department of Earth Sciences, Graduate School of ScienceTohoku University Sendai Japan
4. SPring‐8Japan Synchrotron Radiation Institute Hyogo Japan
5. Center for High Pressure Science and Technology Advanced Research Beijing China