Ba-Cu-O-Y, Square pyramid 5-vertex, Transitional

• Ba-Cu-O-Pr-Y
• Ba-Cu-Fe-O-Y
• Ba-Ca-Cu-O-Y
• Ba-Cu-O-Y-Zn
• superconductivity
• electronic and electrical properties
• thermal and thermodynamic properties
• superconducting transition temperature
• values of superconducting transition temperature
• transitional
• chalcogen
• alkaline
• rare earth
• disordered
• orthorhombic
• tetragonal