Chalcogen, Nonmetal, Katiyar, Optical properties

• Bi-Nd-O-Ti
• O-Sn-Sr
• Fe-O-Pb-Ta
• Be-Mg-O-Zn
• Fe-Nb-O-Pb
• phonons
• wavenumber of optical phonon
• Raman spectra
• optical conductivity
• optical absorption
• nonmetal
• oxide
• chalcogen
• transitional
• disordered
• tetragonal
• orthorhombic
• cubic
• monoclinic
• hexagonal