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

• 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
• transitional
• chalcogen
• alkaline
• rare earth
• oxide