Birefringent, Chalcogen, Non-disordered, Refractive index

• Ba-Na-Nb-O
• Ag-Ga-S
• Gd-Mo-O
• Li-Nb-O
• Li-O-Rb-S
• values of refractive index
• birefringence
• extraordinary refractive index
• ordinary refractive index
• birefringent
• non-disordered
• chalcogen
• nonmetal
• transitional
• orthorhombic
• tetragonal
• trigonal
• monoclinic
• hexagonal