Optical phonon wavenumber - composition diagram

• O-Pb-Ti-Zr
• Ba-Co-Cu-O-Y
• Ca-Cu-O-Pb-Sr-Tl-Y
• Ba-Cu-Fe-O-Y
• Mn-O-Tb-Y
• chalcogen
• transitional
• disordered
• oxide
• conductor
• orthorhombic
• tetragonal
• cubic
• trigonal
• monoclinic