Optical phonon wavenumber - composition diagram

• Ba-Co-Cu-O-Y
• Ca-Cu-O-Pb-Sr-Tl-Y
• Ba-Cu-Fe-O-Y
• Bi-Ca-Cu-O-Pb-Sr
• Nb-Ni-O-Pb-Ti-Zr
• chalcogen
• transitional
• alkaline
• disordered
• conductor
• tetragonal
• orthorhombic
• cubic
• trigonal
• hexagonal