1. Center for High
Pressure Science and Technology Advanced Research, Beijing 100094, P. R. China
2. Geophysical
Laboratory, Carnegie Institution of Washington, Washington, D.C. 20015, United States
3. Neutron
Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, United States
4. HPSynC,
Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, United States