Chalcogen, Non-disordered, Quaternary, Energy gap for indirect transition

• Hg-Mo-O-Te
• Cu-K-S-Sb
• Bi-Na-O-W
• B-Ba-Bi-O
• Ba-Bi-O-Ta
• non-disordered
• chalcogen
• quaternary
• conductor
• semiconductor
• monoclinic
• orthorhombic
• tetragonal
• triclinic
• trigonal