1. The Institute for Advanced Studies Wuhan University Wuhan 430072 China
2. Department of Chemistry Zhejiang University Hangzhou 310027 P. R. China
3. State Key Laboratory of Silicate Materials for Architectures (SMART) Wuhan University of Technology Wuhan 430070 P. R. China
4. School of Physics State Key Laboratory of Crystal Materials Shandong University Jinan 250100 P. R. China
5. Key Laboratory of Materials Processing and Mold Ministry of Education Zhengzhou University Zhengzhou 450002 China