Alkali, Birefringent, Nonmetal, Orthorhombic, Refractive index

• Cl-Rb-Zn
• Ba-Na-Nb-O
• Li-O-Rb-S
• Cl-Cs-Hg
• Br-Cs-Hg
• birefringence
• values of refractive index
• circular birefringence
• birefringent
• nonmetal
• alkali
• non-disordered
• transitional