Ba-Cu-O-Y, Crystal cell, Disordered, Tetragonal

• Ba-Cu-Fe-O-Y
• Ba-Co-Cu-O-Y
• Ba-Ca-Cu-Hg-O-Tl-Y
• Al-Ba-Cu-O-Y
• mechanical properties
• compressibility
• rare earth
• chalcogen
• alkaline
• disordered
• transitional