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• Cr-Cu-Fe-Se
• Fe-Se
• Cs-I-O
• O-Rb-Se-V
• Fe-S
• structural properties
• magnetic properties
• optical properties
• electronic and electrical properties
• Moessbauer spectra
• chalcogen
• transitional
• quaternary
• non-disordered
• oxide
• monoclinic
• orthorhombic
• hexagonal
• cubic
• trigonal