Khim, Metal, Quaternary

• Ba-Cu-O-Y
• As-Ba-Fe-K
• As-Co-Fe-Sr
• As-Co-Fe-Li
• Ba-Cu-Gd-O
• superconductivity
• superconducting transition temperature
• values of superconducting transition temperature
• thermal and thermodynamic properties
• electronic and electrical properties
• transitional
• conductor
• metal
• quaternary
• alkaline
• orthorhombic
• tetragonal