Chalcogen, Katiyar

• Fe-O-Pb-Ta
• Bi-Fe-O
• Fe-Nb-O-Pb
• O-Sn-Sr
• Co-O-Zn
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phonons
• magnetic properties
• chalcogen
• oxide
• transitional
• disordered
• ferroelectric
• tetragonal
• trigonal
• cubic
• orthorhombic
• monoclinic