Alkaline, Transitional, Ba-Cu-Fe-O-Y, Structural properties

• Ba-Ca-Cu-Fe-O-Y
• Ba-Cu-Fe-O-Sr-Y
• Ba-Cu-Fe-O-Pr-Y
• Ba-Cu-Fe-Mn-O-Y
• high-tc superconductor
• disordered
• alkaline
• chalcogen
• oxide
• tetragonal
• orthorhombic