1. Institute of Inorganic Chemistry
2. University of Regensburg
3. 93040 Regensburg
4. Germany
5. Institute of Physical and Theoretical Chemistry
6. Institut Laue-Langevin
7. Grenoble Cedex 9
8. France
9. Institut de chimie séparative de Marcoule (ICSM)
10. UMR 5257 (CEA, CNRS, UM, ENSCM)
11. 30207 Bagnols-sur-Cèze