1. Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
2. High Pressure Collaborative Access Team, X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
3. Department of Physics, Indian Institute of Technology Hyderabad, Kandi Sanga Reddy 502 285, Telengana, India
4. School of Physics, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad 500 046, Telengana, India
5. Department of Materials Science and Metallurgy, University of Cambridge, Cambridge CB3 0FS, U.K.
6. Department of Physics, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, Nevada 89054, United States
7. Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550, United States
8. Department of Physics, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States