Birefringent, Electronic and electrical properties, Tetragonal

• Nb-O-Pb-Ti-Zn
• Cu-In-Te
• K-Li-Nb-O
• Ba-Nb-O-Sr
• Ba-Na-Nb-O
• permittivity (dielectric constant)
• electronic energy gap
• values of electronic energy gap
• ferroelectric transitions
• birefringent
• transitional
• chalcogen
• nonmetal
• disordered