1. Peter A. Rock Thermochemistry Laboratory and Nanomaterials in the Environment, Agriculture, and Technology Organized Research Unit, University of California, Davis, CA 95616, USA.
2. Naval Research Laboratory, Washington, DC 20375, USA.
3. Institute of Mineralogy, Petrology and Geochemistry, Albert-Ludwigs-Universität Freiburg, D-79104 Freiburg, Germany.