Chalcogen, Disordered, Fe-Si, Values of electronic energy gap

• Al-Fe-H-Mg-O-Si
• Fe-Mg-O-Si
• Fe-O-Si
• Fe-H-Mg-O-Si
• Al-Ca-Fe-O-Si
• metalloid
• transitional
• disordered
• chalcogen
• monoclinic
• orthorhombic
• cubic
• triclinic
• trigonal