All 4-vertex, Chalcogen

• Ba-Cu-O-Y
• Fe-O
• O-Si
• Ca-La-Mn-O
• C-H-N-O
• thermal and thermodynamic properties
• structural properties
• electronic and electrical properties
• magnetic properties
• phase transitions
• chalcogen
• transitional
• non-disordered
• disordered
• orthorhombic
• monoclinic
• cubic
• tetragonal
• trigonal