Bi, Conductor, Optical properties, Trigonal

• Bi-Fe-O
• Bi-Se
• Bi-Na-O-Ti
• Bi-Te
• Bi-I-Te
• phonons
• optical spectra
• Raman spectra
• wavenumber of optical phonon
• optical absorption
• pnictogen
• conductor
• semiconductor
• chalcogen
• disordered