Alkali, Non-disordered, Ternary, Energy gap for direct transition

• Cs-I-Sb
• Br-Cs-Ge
• Cl-K-Zn
• As-K-Zn
• Ag-C-Cs
• non-disordered
• ternary
• alkali
• transitional
• tetragonal
• trigonal
• cubic
• hexagonal
• orthorhombic