1. Institute for Inorganic and Analytical Chemistry, University of Muenster, Correnstr. 30, 48149 Münster, Germany
2. Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi-ku, 819-0395 Fukuoka, Japan
3. Institut Laue-Langevin, 71 Avenue des Martyrs, 38042 Grenoble, Cedex 9, France