Birefringent, Refractive index

• Cl-Rb-Zn
• Ba-Na-Nb-O
• Li-O-Rb-S
• H-Li-N-O-S
• Cl-Cs-Hg
• birefringence
• values of refractive index
• extraordinary refractive index
• ordinary refractive index
• birefringent
• nonmetal
• transitional
• non-disordered
• chalcogen
• orthorhombic
• tetragonal
• trigonal
• monoclinic
• hexagonal