Birefringent, Chalcogen, Nonmetal, Transitional, Refractive index

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