Birefringent, Chalcogen, Transitional, Refractive index

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