Conductor, Disordered, Transitional, Kao

• As-Ba-Fe-K
• Cu-La-O-Sr
• Gd-O-Zr
• Cr-O-Sr-Y
• Ce-Cu-Nd-O
• structural properties
• electronic and electrical properties
• magnetic properties
• optical properties
• optical spectra
• disordered
• conductor
• transitional
• chalcogen
• oxide
• tetragonal
• orthorhombic
• cubic
• trigonal
• hexagonal