1. Department of Chemistry, Materials and Surfaces, SP Technical Research Institute of Sweden, Borås, Sweden.
2. Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC, USA.
3. NASA Goddard Space Flight Center, Greenbelt, Maryland, USA.
4. NASA Postdoctoral Program (NPP), Oak Ridge Associated Universities, Oak Ridge, Tennessee, USA.
5. Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany.
6. Earth and Planetary Exploration Services, Oslo, Norway.