Birefringent, Chalcogen, Optical properties, Orthorhombic

• I-S-Sb
• Gd-Mo-O
• Ba-Na-Nb-O
• Cu-Li-O
• Ba-Mo-O-Te
• refractive index
• phonons
• values of refractive index
• non-linear optics
• wavenumber of optical phonon
• chalcogen
• birefringent
• non-disordered
• nonmetal
• transitional