Alkaline, Multinary, Transitional, Awad

• Ba-Ca-Cu-Hg-O-Sm-Tl
• Ba-Ca-Cu-Hg-O-Tl-Yb
• Ba-Ca-Cu-Hg-O-Tl
• Bi-Ca-Cu-O-Pb-Sr
• Ba-Ca-Cu-Na-O-Tl
• electronic and electrical properties
• structural properties
• conductivity or resistivity
• superconductivity
• electrical resistivity
• transitional
• multinary
• chalcogen
• alkaline
• high-tc superconductor
• tetragonal
• orthorhombic