1. a Faculty of Sciences , University Cadi Ayyad, Laboratory of Mineral Solid State Chemistry , Bd. My Abdallah, B.P. 2390, Marrakech , Morocco
2. b Faculty of Sciences and Technics , University Cadi Ayyad , B.P. 549, Marrakech , Morocco
3. c University of Toulon and Var , L2MP(UMR CNRS 6137), La Garde , 83957 , France