Alkali, Transitional, Energy gap for indirect transition

• Au-Cs
• Ba-Na-O-Sr-Ti
• Cl-K-Zn
• Bi-Na-O-W
• Cl-Cs-K-Zn
• alkali
• transitional
• non-disordered
• ternary
• chalcogen
• trigonal
• tetragonal
• cubic
• orthorhombic
• monoclinic