Ba-Co-O-Y, Debye or einstein temperature, Y-x polyhedra

• Ba-Co-O-Sr-Y
• Ba-Co-Cu-O-Y
• Ba-Ca-Co-O-Y
• Ba-Co-Fe-O-Y
• rare earth
• transitional
• alkaline
• chalcogen
• disordered
• orthorhombic
• tetragonal
• hexagonal
• trigonal
• monoclinic