1984, Chalcogen

• S-Ta
• O-V
• As-Se-Tl
• Nb-Se
• Fe-O
• structural properties
• electronic and electrical properties
• magnetic properties
• phase transitions
• phase diagram
• chalcogen
• transitional
• non-disordered
• ternary
• disordered
• cubic
• trigonal
• monoclinic
• orthorhombic
• tetragonal