1998, Chalcogen

• Ba-Cu-O-Y
• La-Mn-O-Sr
• Ca-La-Mn-O
• Bi-Ca-Cu-O-Sr
• Sb-Se-Tl
• structural properties
• magnetic properties
• electronic and electrical properties
• optical properties
• phase transitions
• chalcogen
• transitional
• disordered
• alkaline
• rare earth
• orthorhombic
• cubic
• tetragonal
• monoclinic
• trigonal