Alkaline, Chalcogen, Rare earth, Phonons, Trigonal

• La-Mn-O-Sr
• Ba-Co-La-O
• Ca-La-Mn-O
• B-Ba-O-Y
• B-O-Sr-Y
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• chalcogen
• rare earth
• alkaline
• transitional
• lanthanoid