Conductor, Metal, Rare earth, Lowest temperature of investigation

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