Birefringent, Li-Nb-O, Optical properties, Trigonal

• Li-Mg-Nb-O
• Dy-Li-Nb-O
• Fe-Li-Nb-O-Zr
• Ho-Li-Nb-O-Tm-Yb
• optical absorption
• phonons
• wavenumber of optical phonon
• refractive index
• luminescence
• ferroelectric
• birefringent
• chalcogen
• alkali
• nonmetal