Ba-Cu-O-Y, Structural properties, Trigonal bipyramid 5-vertex

• Ba-Cu-La-O-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Sr-Y
• Ba-Cu-O-Pr-Y
• mechanical properties
• compressibility
• thermal and thermodynamic properties
• thermal expansion
• rare earth
• chalcogen
• alkaline
• high-tc superconductor
• transitional
• orthorhombic
• tetragonal