1. Department of Materials Science and Engineering, University of Florida, Gainesville, FL 32611, USA
2. Laboratoire Lorrain de Chimie Moléculaire L2CM, Université de Lorraine, CNRS, F-54000 Nancy, France
3. CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
4. Center for Hierarchical Waste Form Materials and Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA