1. Institut
Laue-Langevin, 6 rue Jules
Horowitz, BP 156, 38042 Grenoble Cedex 9, France
2. Department
of Physical Chemistry, Lund University, P.O. Box 124, S-221 00 Lund, Sweden
3. Department
of Chemistry, Durham University, South Road, DH1 3LE Durham, United Kingdom
4. Chemical
Faculty, St. Petersburg State University, Universitetsky pr. 2, 198904 St. Petersburg, Russia
5. Institute
of Chemistry, Eötvös Loránd University, Budapest 112, P.O. Box 32, H-1518 Hungary