Ba-Ca-Cu-Hg-O-Tl, Hg-x polyhedra

• Ba-Ca-Cu-Hg-O-Tl-Y
• Ba-Ca-Cu-Hg-O-Sr-Tl
• structural properties
• electronic and electrical properties
• thermal and thermodynamic properties
• superconductivity
• conductivity or resistivity
• disordered
• cuprate
• chalcogen
• alkaline
• high-tc superconductor
• tetragonal