Chalcogen, Transitional, Cubic, Katiyar

• Fe-Nb-O-Pb
• Hf-Ho-O
• Fe-O-Pb-Ta
• Co-O-Zn
• Bi-Fe-O-Pb-W
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phonons
• phase transitions
• transitional
• oxide
• chalcogen
• disordered
• nonmetal