Alkali, Transitional, Phonons, Tetragonal

• Fe-K-Se
• Ag-C-Cl-Cs-N
• Bi-Na-O-W
• Ce-Li-Mo-O
• As-Ba-Fe-K
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• transitional
• alkali
• chalcogen
• non-disordered
• disordered