1. Electron Microscopy for Materials Research (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp,
Belgium
2. Department of Chemistry, Moscow State University, 119991 Moscow, Russia
3. National Institute of Chemical Physics and Biophysics, 12618
Tallinn, Estonia
4. Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
5. Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland