1. Université du Littoral Côte d’Opale, LPCA, EA CNRS 4493, F-59140 Dunkerque, France
2. Faculty
of Science, Yamagata University, Yamagata 990-8560, Japan
3. Sciences
Chimiques de Rennes, UMR CNRS 6226, eq Verres et Céramiques, Université de Rennes I, F-35042 Rennes, France
4. Neutron
Scattering Science Directorate, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37831-6475, United States
5. ISIS
Facility, Rutherford Appleton Laboratory, Chilton, Didcot, OX11
0QX, U.K.
6. X-ray Science
Division, Argonne National Laboratory, Argonne, Illinois 60439, United States