1. Department of Physics, Umeå University, S-90187 Umeå, Sweden
2. Department of Chemistry, Lomonosov Moscow State University, Leninskie Gory, Moscow 119991, Russia
3. National Research Centre “Kurchatov Institute”, Moscow 123098, Russia
4. The Rossendorf Beamline at ESRF − The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
5. Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, P. O. Box 510119, 01314 Dresden, Germany
6. The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France