Chalcogen, Transitional, P321

• Ga-La-O-Si
• Ba-Fe-Nb-O-Si
• Ga-La-O-Ta
• Ga-La-Nb-O
• Ca-Ga-O-Si-Ta
• structural properties
• magnetic properties
• electronic and electrical properties
• permittivity (dielectric constant)
• mechanical properties
• chalcogen
• transitional
• metalloid
• langasite
• alkaline
• trigonal