1. Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
2. Centre for Science at Extreme Conditions and School of Chemistry, University of Edinburgh, King’s Building, Mayfield Road, Edinburgh, U.K. EH9 3JZ
3. ISIS Facility, Rutherford Appleton Laboratory, Chilton, U.K.