Chalcogen, Rare earth, Kemmler sack, Structural properties

• Ba-Gd-O-U
• Co-Cu-La-O-Sr
• Ba-Co-Cu-O-Y
• Ba-O-U-Y
• Ba-Eu-O-U
• chalcogen
• rare earth
• oxide
• alkaline
• lanthanoid
• cubic
• trigonal
• tetragonal
• orthorhombic
• hexagonal