Ba-Cu-O-Y, Chalcogen, Square pyramid 5-vertex, Values of superconducting transition temperature

• Ba-Cu-O-Pr-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Y-Zn
• Ba-Cu-Fe-O-Y
• high-tc superconductor
• alkaline
• chalcogen
• disordered
• rare earth
• orthorhombic
• tetragonal