Al-Mg-O, Electronic and electrical properties, Mg-x polyhedra, Trigonal

• Al-B-H-Mg-Na-O-Si
• Al-Ca-Fe-H-Mg-O-S
• Al-C-H-Mg-Na-O
• Al-B-Ca-Cr-H-Mg-Na-O-Si-V
• Al-H-Mg-O-Si
• effective mass
• electrical conductivity
• electronic energy gap
• values of electronic energy gap
• chalcogen
• alkaline
• disordered
• multinary