1. Department of Physics and Astronomy, High Pressure Science and Engineering Center, University of Nevada, Las Vegas, Nevada 89154, United States
2. Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai 201203, P. R. China
3. Department of Geological Sciences, Stanford University, Stanford, California 94305, United States
4. High Pressure Collaborative Access Team, X-ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
5. Hawai’i Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawai’i at Manoa, Honolulu, Hawaii 96822, United States
6. Geophysical Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, United States