Chalcogen, Orthosilicate, Electronic and electrical properties, Trigonal

• B-Nd-O-Si
• Al-Ca-Nb-O-Si
• Na-O-P-Si-Zr
• Fe-O-Si-Sn
• Ca-Ga-O-Si-Ta
• electrical conductivity
• effective mass
• electronic energy gap
• values of electronic energy gap
• permittivity (dielectric constant)
• metalloid
• orthosilicate
• chalcogen
• transitional