O-Ti, Optics, Oxide, Transitional

• Ba-O-Ti
• O-Sr-Ti
• O-Pb-Ti
• La-O-Ti
• phonons
• Raman spectra
• optical spectra
• optical absorption
• wavenumber of optical phonon
• oxide
• transitional
• chalcogen
• disordered
• nonmetal
• tetragonal
• cubic
• orthorhombic
• monoclinic
• trigonal