Chalcogen, Conductor, Transitional, Poisson ratio

• Ba-Cu-O-Y
• Bi-Ca-Cu-O-Sr
• Ca-O-Ti
• Fe-O-Y
• Ga-La-O-Si
• chalcogen
• conductor
• transitional
• semiconductor
• non-disordered
• cubic
• orthorhombic
• tetragonal
• trigonal
• hexagonal