Northwestern Univ., 633 Clark St., Evanston, IL 60208, United States ; Department of Mineral Sciences, Smithsonian Inst., Washington, DC 20013, United States
Department of Mineral Sciences, Smithsonian Inst., Washington, DC 20013, United States
National Synchrotron Light Source, Brookhaven Natl. Lab., Upton, NY 11973, United States
Grad. Sch. of Oceanography, University of Rhode Island, Narragansett, RI 02882, United States