El ataoui

• Cu-Fe-O
• Cu-Fe-Ga-O
• Cu-Fe-O-V
• Cu-Ni-O-V
• magnetic properties
• Moessbauer spectra
• structural properties
• values of Moessbauer spectra
• isomer shift
• transitional
• chalcogen
• antiferromagnetic
• tripolyhedral
• oxide
• trigonal