1. Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, Ontario K1P 6P4, Canada
2. Faculty of Geology, Moscow State University, Vorobyovy Gory, 119992 Moscow, Russia
3. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow Oblast 142432, Russia
4. Faculty of Geology, Moscow State University, Vorobyovy Gory, Moscow 119992, Russia
5. Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 117901, Russia
6. Institute of Mineralogy, Urals Branch of Russian Academy of Sciences, Miass, Chelyabinsk Oblast 456300, Russia
7. Institute of Experimental Mineralogy, Russian Academy of Sciences, Chernogolovka, Moscow Oblast 142432, Russia
8. Department of Crystallography, St. Petersburg State University, University Embankment 7/9, St. Petersburg 199034, Russia
9. Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, Vienna A–1090, Austria