Chalcogen, Metal, Transitional, Karpinski, Orthorhombic

• Ba-Cu-O-Y
• Ba-Ca-Cu-O-Y
• Fe-Se
• As-Fe-O-P-Sm
• As-Fe-Gd-O
• superconductivity
• superconducting transition temperature
• structural properties
• values of superconducting transition temperature
• electronic and electrical properties
• transitional
• chalcogen
• metal
• conductor
• rare earth