P4bm

• Ba-Nb-O-Sr
• Ba-Na-Nb-O-Sr
• Eu-Nb-O-Sr-Ti
• Ba-Nb-O-Ti
• K-O-V
• structural properties
• electronic and electrical properties
• permittivity (dielectric constant)
• optical properties
• phase transitions
• transitional
• chalcogen
• alkaline
• disordered
• oxide
• tetragonal
• orthorhombic