Values of superconducting transition temperature, Y-x polyhedra

• Ba-Cu-O-Y
• Ba-Cu-O-Pr-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Y-Zn
• Ba-Cu-Fe-O-Y
• rare earth
• transitional
• disordered
• chalcogen
• alkaline
• orthorhombic
• tetragonal
• cubic
• hexagonal
• monoclinic