Alkaline, Conductor, Semiconductor, Ternary, Energy gap for direct transition

• O-Sr-Ti
• Mg-O-Zn
• Mg-Se-Zn
• Be-Se-Zn
• Ba-Ga-Se
• ternary
• semiconductor
• conductor
• alkaline
• chalcogen
• cubic
• tetragonal
• orthorhombic
• trigonal
• hexagonal