Alkali, Cell and atoms, Electronic energy gap, Tetragonal

• Al-F-K
• K-Nb-O
• Al-F-Rb
• Cl-K-Mg
• Al-H-Na-O-Si
• values of electronic energy gap
• energy gap for direct transition
• energy gap for indirect transition
• alkali
• chalcogen
• transitional
• non-disordered