Ba2CaCu2O8Tl2, Chalcogen, Quinary

• Ba-Ca-Cu-O-Tl
• superconductivity
• superconducting transition temperature
• values of superconducting transition temperature
• electronic and electrical properties
• structural properties
• transitional
• high-tc superconductor
• alkaline
• cuprate
• disordered
• tetragonal