Chalcogen, Transitional, Cubic, Katiyar

• Fe-Nb-O-Pb
• Ca-Cu-O-Ti
• Fe-Nb-O-Pb-Ta-Ti-W-Zr
• Bi-Fe-O-Pb-W
• Co-O-Zn
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phonons
• phase transitions
• transitional
• chalcogen
• oxide
• disordered
• quaternary