Alkali, Chalcogen, Oxide, Transitional, Phonons, Tetragonal

• La-Na-O-Ti
• Na-Nd-O-Ti
• Bi-Na-O-Ti
• Gd-Na-O-Ti
• Na-O-Sm-Ti
• wavenumber of optical phonon
• Raman spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• infrared spectra
• oxide
• transitional
• alkali
• chalcogen
• quaternary