1. Institute for Solid State Chemistry, Russian Academy of Sciences, Urals Division, 91 Pervomayskaya Strasse, Yekaterinburg 620990, Russia
2. Bayerisches Geoinstitut, Universität Bayreuth, Universitätsstrasse
30, Bayreuth D-95447, Germany
3. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
4. National Institute of Chemical Physics and Biophysics, Akadeemia tee 23, 12618 Tallinn, Estonia
5. Institute of Metal Physics, Russian Academy of Sciences, Urals Division, GSP-170, 18 S. Kovalevskaya Strasse, Yekaterinburg 620990, Russia