Chalcogen, Transitional, Katiyar, Trigonal

• Bi-Fe-O
• Ca-Cu-O-Ti
• Nb-O-Pb-Sc
• Nb-O-Pb-Sc-Ta
• O-Pb-Sc-Ta
• electronic and electrical properties
• permittivity (dielectric constant)
• structural properties
• optical properties
• phonons
• oxide
• transitional
• chalcogen
• ferroelectric
• disordered