Chalcogen, Conductor, Disordered, Poisson ratio

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