Stanford University, Surface & Aqueous Geochemistry Group, Department of Geological & Environmental Sciences, Stanford, CA 94305-2115 United States
Stanford University, Surface & Aqueous Geochemistry Group, Department of Geological & Environmental Sciences, Stanford, CA 94305-2115 United States ; Stanford Synchrotron Radiation Laboratory, SLAC, 2575 Sand Hill Rd., MS. 99, Menlo Park, CA 94025 United States