1. Institut für Nukleare Entsorgung, Forschungszentrum Karlsruhe, Postfach 3640, 76021 Karlsruhe, Germany
2. Culgi B.V., P.O. Box 252, 2300 AG Leiden, The Netherlands
3. Laboratory of Physical Chemistry and Colloid Science, Wageningen University, P.O. Box 8038, 6700 EK Wageningen, The Netherlands
4. Department of Chemistry, Umeå University, 901 87 Umeå, Sweden