Alkaline, Chalcogen, Transitional, Phonons, Trigonal

• La-Mn-O-Sr
• Ca-Mn-O
• Ca-Cu-O-Ti
• Ba-O-V
• O-Sr-V
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• transitional
• alkaline
• chalcogen
• disordered
• oxide