Alkali, Chalcogen, Nonmetal, Phonons, Trigonal

• Li-Nb-O
• Bi-Na-O-Ti
• Fe-K-Mo-O
• Li-O-Ta
• Na-O-P-Zr
• wavenumber of optical phonon
• Raman spectra
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• nonmetal
• chalcogen
• alkali
• transitional
• disordered