Ba-Cu-O-Y, Tetrahedron 4-vertex, Transitional

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