Ba-Cu-O-Y, Intermediate valence, Values of superconducting transition temperature

• Ba-Cu-Fe-O-Y
• Ba-Cu-O-Y-Zn
• Ba-Cu-Ni-O-Y
• Ba-Cu-La-O-Y
• alkaline
• high-tc superconductor
• chalcogen
• conductor
• intermediate valence
• orthorhombic
• tetragonal