Lavrishchev

• Ce-Gd-Lu-O-Si
• Ba-Ca-F
• Ce-Gd-O-Si
• Ca-Mg-O-Si
• Ba-F
• structural properties
• values of electronic energy gap
• electronic energy gap
• electronic and electrical properties
• chalcogen
• lanthanoid
• rare earth
• quaternary
• metalloid
• monoclinic
• cubic
• orthorhombic