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

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