Ba-Cu-Er-O, Er-x polyhedra, Rare earth, Transitional

• Ba-Cu-Er-Ni-O
• Ba-Cu-Er-O-Pt
• Ba-Cu-Er-O-Zn
• Ba-Cu-Er-O-Pr
• magnetic properties
• electronic and electrical properties
• thermal and thermodynamic properties
• superconductivity
• superconducting transition temperature
• oxide
• lanthanoid
• chalcogen
• alkaline
• rare earth
• orthorhombic
• tetragonal
• cubic
• monoclinic