Birefringent, Chalcogen, Refractive index

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