Chalcogen, Oxide, Phonons, Trigonal

• Bi-Fe-O
• Li-Nb-O
• Fe-O
• Li-O-Ta
• La-Mn-O-Sr
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• oxide
• chalcogen
• transitional
• disordered
• non-disordered