Alkali, Chalcogen, Non-disordered, Phonons, Tetragonal

• Bi-Na-O-W
• H-K-O-P
• La-Na-O-Ti
• Na-Nd-O-Ti
• Na-O-Sm-Ti
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• alkali
• non-disordered
• chalcogen
• transitional
• quaternary