Alkali, Electronic and electrical properties, Trigonal

• Bi-Na-O-Ti
• Ba-Bi-Na-O-Ti
• Li-Nb-O
• Li-O-Ta
• La-Mn-Na-O
• electrical conductivity
• effective mass
• electronic energy gap
• values of electronic energy gap
• permittivity (dielectric constant)
• alkali
• chalcogen
• transitional
• disordered