1970, Chalcogen

• O-W
• Fe-S
• O-V
• O-U
• Cr-O-V
• structural properties
• electronic and electrical properties
• phase transitions
• phase diagram
• chalcogen
• transitional
• non-disordered
• ternary
• disordered
• cubic
• orthorhombic
• monoclinic
• hexagonal
• trigonal