1. Department
of Physics, Interdepartmental Centre NIS, University of Torino, via Giuria 1, I-10125 Torino, Italy
2. Department
of Chemistry, Interdepartmental Centre NIS and INSTM
Centro di Riferimento, University of Torino, via Giuria 7, I-10125 Torino, Italy
3. CrisDi
Interdepartmental
Center for Crystallography, University of Torino, Italy
4. INRIM, National Institute of Metrological Research, Strada delle Cacce 91, I-10135 Torino, Italy
5. Southern Federal University, Zorge
Street 5, 344090 Rostov-on-Don, Russia
6. Experiments
Division, European Synchrotron Radiation Facility, 6, rue Jules
Horowitz, B.P. 220, F-38043 Grenoble Cedex, France