1. Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University, Sendai, Miyagi 980-8578, Japan.
2. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia.
3. Center for Novel Material Science under Multi-Extreme Conditions, Graduate School of Material Science, University of Hyogo, Kamigori, Hyogo 678-1297, Japan.
4. Materials Dynamics Laboratory, RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan.
5. Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai Miyagi 980-8578, Japan.
6. Geodynamics Research Center, Ehime University, Matsuyama, Ehime 790-8577, Japan.
7. Research and Utilization Division, Japan Synchrotron Radiation Research Institute, SPring-8, 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan.
8. Department of Earth and Planetary Sciences, Kobe University, Kobe 657-8501, Japan.