Chalcogen, Transitional, Katiyar

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