1. Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road, NW, Washington, DC 20015, USA.
2. Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warszawa, Poland.
3. High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution for Science, Advanced Photon Source, Argonne, IL 60439, USA.
4. Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, USA.
5. Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, USA.
6. Department of Earth and Environmental Sciences, Ludwig Maximilians Universität, Munich 80333, Germany.
7. Department of Physics and Astronomy and London Centre for Nanotechnology, University College London, London, UK.