Chalcogen, Rare earth, Ijpbev

• Ba-Cu-O-Y
• Ba-Cu-O-Pr-Y
• La-Mn-O-Sr
• Eu-S
• Ba-Cu-La-O
• structural properties
• chalcogen
• rare earth
• lanthanoid
• transitional
• alkaline
• orthorhombic
• tetragonal
• cubic
• trigonal