1. Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università di Parma, Parma, Italy
2. Laboratoire des Matériaux Inorganiques, Clermont Université, ENSCCF, BP10448, F-63000 Clermont-Ferrand, France
3. CNRS, UMR6002, F-63177 Clermont-Ferrand, France
4. Laboratory of Solid State Chemistry, DB, Università di Verona, and INSTM, UdR Verona, Verona, Italy
5. Faculty of Applied Sciences, Delft University of Technology, Delft, The Netherlands