Ba-Nb-O-Sr, Birefringent, Transitional, Tetragonal

• Ba-K-Na-Nb-O-Sr
• Ba-Nb-O-Sr-Ti
• Ba-La-Nb-O-Sr
• electronic and electrical properties
• structural properties
• permittivity (dielectric constant)
• thermal and thermodynamic properties
• phase transitions
• ferroelectric
• birefringent
• alkaline
• chalcogen
• piezoelectric