Alkaline, Oxide, Quaternary, Kan

• Ba-Cu-O-Sm
• Ba-Cu-Er-O
• Ba-Cu-Dy-O
• Ba-Cu-O-Tm
• Ba-Cu-Ho-O
• electronic and electrical properties
• conductivity or resistivity
• electrical resistivity
• structural properties
• superconductivity
• quaternary
• chalcogen
• alkaline
• oxide
• transitional
• orthorhombic
• tetragonal
• cubic
• hexagonal
• trigonal