Ba-Cu-O-Y, Chalcogen, Square pyramid 5-vertex, Structural properties

• Ba-Cu-Fe-O-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-La-O-Y
• Ba-Co-Cu-O-Y
• mechanical properties
• compressibility
• thermal and thermodynamic properties
• thermal expansion
• transitional
• alkaline
• rare earth
• chalcogen
• oxide
• orthorhombic
• tetragonal