1. Department of Chemistry; Southern University of Science and Technology, SUSTech; Shenzhen Guangdong 518055 P.R. China
2. College of Chemistry; Nankai University; Tianjin 300071 P.R. China
3. High Pressure Synergetic Consortium, HPSynC, Geophysical Laboratory; Carnegie Institution of Washington; Argonne IL 60439 USA
4. Wuhan National Laboratory for Optoelectronics, WNLO and School of Optical and Electronic Information; Huazhong University of Science and Technology, HUST; Wuhan 430074 P.R. China
5. State Key Laboratory of Superhard Materials; Jilin University; Changchun 130012 P.R. China