Electronic and electrical properties, Na-Nb-O-Sr, Nb-x polyhedra, Tetragonal

• Ba-K-Na-Nb-O-Sr
• Bi-Na-Nb-O-Sr
• Ca-Na-Nb-O-Rb-Sr
• Ca-Ce-Na-Nb-O-Sr-Ti
• permittivity (dielectric constant)
• electrical conductivity
• effective mass
• conductivity or resistivity
• disordered
• alkali
• alkaline
• chalcogen
• transitional