Alkaline, Chalcogen, Oxide, Transitional, Phonons, Trigonal

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