1978, Chalcogen

• O-V
• Na-S-V
• Nb-Se
• Sb-Te
• Ba-O-Sr-Ti
• structural properties
• electronic and electrical properties
• magnetic properties
• phase transitions
• phase diagram
• chalcogen
• transitional
• non-disordered
• ternary
• disordered
• cubic
• orthorhombic
• monoclinic
• trigonal
• hexagonal