As-Ba-Fe, As-x polyhedra, Superconductivity energy gap

• As-Ba-Fe-K
• As-Ba-Co-Fe
• As-Ba-Fe-Ru
• As-Ba-Fe-Na
• As-Ba-Fe-Rb
• values of superconductivity energy gap
• pnictogen
• metalloid
• alkaline
• disordered
• transitional
• tetragonal
• orthorhombic