Ba-Cu-O-Y, Tetrahedron 4-vertex, Values of superconducting transition temperature

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