1. Section of Minerals and Earth Sciences, Carnegie Museum of Natural History, 4400 Forbes Avenue, Pittsburgh, Pennsylvania 15213, U.S.A.
2. Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, U.S.A.
3. Department of Geology and Environmental Earth Science, Miami University, Oxford, Ohio 45056, U.S.A.
4. Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, U.S.A.
5. Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, U.S.A.
6. Applied Chemical and Morphological Analysis Laboratory, Michigan Technological University, Houghton, Michigan 49931, U.S.A.
7. 513 Iron Street, Norway, Michigan 49870, U.S.A.