Tetrahedron 4-vertex, Transitional

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