Antiferroelectric, Ferroelectric, Phonons, Trigonal

• Bi-Fe-O
• Bi-Na-O-Ti
• Ba-O-Ti
• Bi-Dy-Na-O-Ti
• Na-Nb-O
• Raman spectra
• wavenumber of optical phonon
• infrared spectra
• wavenumber of longitudinal optical phonon
• energy of optical phonon
• ferroelectric
• chalcogen
• antiferroelectric
• transitional
• oxide