1. Inorganic Materials Chemistry research group, Department of Chemistry, University of Turku, FI-20014 Turku, Finland
2. Department of Chemistry, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland
3. Wihuri Physical Laboratory, Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
4. Faculty of Science and Engineering/Physics, Åbo Akademi University FI-20500, Turku/Åbo, Finland
5. NMR Research Unit, University of Oulu, P. O. Box 3000, 90014 Oulu, Finland