Antiferroelectric, Ferroelectric, Trigonal

• Bi-Fe-O
• Bi-Na-O-Ti
• Ba-O-Ti
• Bi-K-Na-O-Ti
• Ba-Bi-Na-O-Ti
• electronic and electrical properties
• permittivity (dielectric constant)
• magnetic properties
• structural properties
• optical properties
• ferroelectric
• antiferroelectric
• chalcogen
• transitional
• nonmetal