Alkaline, Chalcogen, Transitional, Keszler

• Ba-Cu-F-Te
• Ba-Cu-F-S
• Ba-Cu-F-Se
• Ba-Cu-S
• B-O-Sc-Sr
• structural properties
• electronic and electrical properties
• optical properties
• conductivity or resistivity
• electrical conductivity
• chalcogen
• alkaline
• transitional
• metalloid
• orthoborate
• trigonal
• tetragonal
• orthorhombic
• monoclinic
• hexagonal