1. Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse 30, D-95447 Bayreuth, Germany
2. Institute for Solid State Chemistry of Ural Branch of Russian Academy of Sciences, Yekaterinburg 620219, Russia
3. M. N. Miheev Institute of Metal Physics of Ural Branch of Russian Academy of Sciences, 18 S. Kovalevskaya Str., Yekaterinburg 620137, Russia
4. Ioffe Institute, St Petersburg 194021, Russia
5. A. V. Nikolaev Institute of Inorganic Chemistry of Russian Academy of Sciences, Siberian Division, Novosibirsk 630090, Russia
6. Institute of Mineralogy and Petrography of Russian Academy of Sciences, Siberian Division, Novosibirsk 630090, Russia
7. Budker Institute of Nuclear Physics of Russian Academy of Sciences, Siberian Division, 630090 Novosibirsk, Russia
8. Institute for Solid State Chemistry and Mechanochemistry of Sibirian Branch of Russian Academy of Sciences, Novosibirsk 630128, Russia
9. M. V. Lomonosov Moscow State University, Physics Department, 119991 GSP1, Moscow, Russia
10. Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa 277-8581 Chiba, Japan