Alkali, Chalcogen, Nonmetal, Phonons, Tetragonal

• Bi-Na-O-W
• Ce-Li-Mo-O
• H-K-O-P
• Bi-Na-O-Ti
• Co-Fe-K-Se
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• nonmetal
• chalcogen
• alkali
• transitional
• disordered