Alkali, Halogen, Non-disordered, Tripolyhedral, Cubic, Phonons

• Cr-F-H-N-Na
• F-K-Mn
• Cl-Cs-Sn
• Br-Cs-Sn
• Cl-Cs-Na-Sm
• vibrational spectra
• infrared spectra
• wavenumber of optical phonon
• Raman spectra
• phonon dispersion
• tripolyhedral
• non-disordered
• alkali
• halogen
• perovskite