Chalcogen, Conductor, Non-disordered, Semiconductor, Thermal energy gap

• O-U
• O-V
• As-Se
• Ga-Se-Tl
• Ga-Te
• non-disordered
• semiconductor
• chalcogen
• conductor
• transitional
• orthorhombic
• tetragonal
• cubic
• monoclinic
• trigonal