Chalcogen, Conductor, Disordered, Phonons, Trigonal

• Bi-Fe-O
• Li-Nb-O
• Fe-O
• Bi-Na-O-Ti
• Bi-Se
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• vibrational spectra
• wavenumber of longitudinal optical phonon
• chalcogen
• disordered
• conductor
• transitional
• semiconductor