Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall Braun Hall, Building 320, Stanford, CA 94305-2115, United States
Department of Chemistry, Chapman University, One University Drive, Orange, CA 92866, United States
Geologic Division, United States Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025, United States
Department of Environmental and Resources Sciences, University of Nevada-Reno, 1664 N. Virginia Street, Reno, NV 89557-0042, United States
Stanford Synchrotron Radiation Laboratory, SLAC, 2545 Sand Hill Road, Menlo Park, CA 94025, United States ; Department of Geological and Environmental Sciences, Stanford University, 450 Serra Mall Braun Hall, Building 320, Stanford, CA 94305-2115, United States