Alkaline, Transitional, Energy gap for indirect transition

• O-Sr-Ti
• Ba-Cu-F-O-Y
• O-Sr-Zr
• Ba-Na-O-Sr-Ti
• Ba-O-Ti
• alkaline
• transitional
• chalcogen
• non-disordered
• conductor
• tetragonal
• cubic
• orthorhombic
• monoclinic
• hexagonal