Borate, Chalcogen, Electronic energy gap, Orthorhombic

• B-H-K-O
• B-Cl-O-Zn
• B-H-Na-O
• B-Br-O-Pb
• B-Ca-O
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• temperature derivative of energy gap
• thermal energy gap
• borate
• chalcogen
• metalloid
• non-disordered