Lowest temperature of investigation, Rare earth

• Ba-Cu-O-Pr
• Cu-La-O
• Ba-Cu-O-Y
• Cu-La-O-Sr
• Ba-Cu-La-O
• rare earth
• transitional
• lanthanoid
• metal
• chalcogen
• tetragonal
• orthorhombic
• cubic
• hexagonal
• monoclinic