1. Inorganic Chemistry 2, Lund University, P.O. Box 124, 221 00 Lund, Sweden
2. Department of Chemistry, UMIST, P.O. Box 88, Manchester M60 1QD, U.K.
3. Department of Physics, Tohoku University, Sendai 980, Japan
4. Inorganic Solid State Chemistry, ETH, Universitätstr. 6, 8092 Zurich, Switzerland
5. Camurus, Sölvegatan 41, 223 70 Lund, Sweden