Chalcogen, Electronic energy gap, Si, Tetragonal

• O-Si
• Al-H-Na-O-Si
• O-Si-Zr
• Ba-Cu-Ge-O-Si
• Al-Ca-H-O-Si
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• metalloid
• chalcogen
• disordered
• silicate