1. École Polytechnique Fédérale de Lausanne, Laboratoire de Cristallographie, BSP-Cubotron, CH-1015 Lausanne, Switzerland
2. Swiss-Norwegian Beamline, ESRF, BP-220, F-38043 Grenoble CEDEX, France
3. École Polytechnique Fédérale de Lausanne, Laboratory of Lanthanide Supramolecular Chemistry, BCH 1405, CH-1015 Lausanne, Switzerland
4. EMPA, Solid State Chemistry and Catalysis, Ueberlandstrasse 129, CH-8600 Duebendorf, Switzerland
5. Department of General Energy Research, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland