Li-Nb-O, Nb-x polyhedra, Optical properties, Trigonal

• Li-Mg-Nb-O
• Fe-Li-Nb-O
• Ba-Li-Nb-O-W
• Li-Nb-O-Ta
• phonons
• wavenumber of optical phonon
• optical absorption
• reflectivity
• values of reflectivity
• transitional
• oxide
• chalcogen
• alkali
• disordered