Bi-Fe-O, Optics, Pnictogen

• Bi-Fe-Nd-O
• Bi-Fe-La-O
• Bi-Fe-O-Sm
• Bi-Fe-O-Sr
• phonons
• Raman spectra
• wavenumber of optical phonon
• optical spectra
• optical absorption
• transitional
• chalcogen
• pnictogen
• disordered
• oxide
• trigonal
• orthorhombic
• cubic
• tetragonal
• triclinic