Alkaline, Chalcogen, Quaternary, Rare earth, Kemmler sack

• Ba-Gd-O-U
• Ba-O-U-Y
• Ba-Cu-O-Y
• Ba-Eu-O-U
• Ba-Dy-O-U
• structural properties
• electronic and electrical properties
• conductivity or resistivity
• electrical resistivity
• superconductivity
• rare earth
• chalcogen
• alkaline
• quaternary
• oxide
• cubic
• trigonal
• orthorhombic
• hexagonal
• monoclinic