1. Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskii Prospekt, 18-2, 119071 Moscow, Russia
2. Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2 Canada
3. Institute of Mineralogy, Ural branch, Russian Academy of Sciences, Ilmen State Nature Reserve, 456317 Miass, Russia
4. Faculty of Geology, National Research South Ural State University, Miass branch, 8 July Str., 10, 456304 Miass, Russia
5. Department of Mineralogy, Moscow State University, Vorobievy Gory, 119991 Moscow, Russia
6. Dipartimento di Scienze della Terra “Ardito Desio”, Università degli Studi di Milano, Via Mangiagalli 34, 20133, Milano, Italy
7. Department of Crystallography, St. Petersburg State University, University Emb. 7/9, 199034 St. Petersburg, Russia