Chalcogen, Disordered, Poisson ratio

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