Alkali, Chalcogen, Disordered, Nonmetal, Phonons, Trigonal

• Li-Nb-O
• Bi-Na-O-Ti
• Li-O-Ta
• La-Na-O-Ti
• Li-Na-Nb-O
• wavenumber of optical phonon
• Raman spectra
• infrared spectra
• wavenumber of longitudinal optical phonon
• vibrational spectra
• nonmetal
• chalcogen
• alkali
• disordered
• transitional