1. Research Centre for Radwaste Disposal & Williamson Research Centre for Molecular Environmental Science, Department of Earth and Environmental Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
2. Civil and Environmental Engineering, University of Strathclyde, Glasgow, G11XQ, U.K.
3. The Rossendorf Beamline at ESRF-The European Synchrotron, CS40220, 38043 Grenoble Cedex 9, France
4. Helmholtz Zentrum Dresden-Rossendorf (HZDR), Institute of Resource Ecology, P.O. Box 510119, 01314 Dresden, Germany
5. National Nuclear Laboratory Limited, Chadwick House, Warrington Road, Birchwood Park, Warrington, WA3 6AE, U.K.