Alkali, Chalcogen, Nonmetal, Transitional, Phonons, Tetragonal

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