Chalcogen, Perovskite, Transitional, Katiyar, Tetragonal

• Fe-O-Pb-Ta
• Fe-O-Pb-Ta-Ti-Zr
• Fe-Nb-O-Pb-Ti-Zr
• Ca-O-Pb-Ti
• Fe-Nb-O-Pb-Ta-Ti-W-Zr
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phonons
• magnetic properties
• transitional
• oxide
• perovskite
• chalcogen
• ferroelectric