Ba-Ca-Cu-O-Tl, Chalcogen, Square pyramid 5-vertex

• Ba-Ca-Cu-Hg-O-Tl
• Ba-Ca-Cu-O-Pb-Sr-Tl
• Ba-Ca-Cu-O-Sr-Tl
• Ba-Bi-Ca-Cu-O-Pb-Sr-Tl
• superconductivity
• electronic and electrical properties
• structural properties
• superconducting transition temperature
• thermal and thermodynamic properties
• oxide
• transitional
• alkaline
• chalcogen
• disordered
• tetragonal