Khadzhai

• Ba-Cu-O-Y
• Ba-Cu-O-Pr-Y
• H-Hf
• Hf
• Ba-Cu-Ho-O
• superconductivity
• structural properties
• superconducting transition temperature
• electrical resistivity
• electronic and electrical properties
• transitional
• chalcogen
• rare earth
• alkaline
• quaternary
• orthorhombic