Birefringence, Birefringent, Nonmetal

• Cl-Rb-Zn
• Li-O-Rb-S
• Cl-Cs-Hg
• Ba-Na-Nb-O
• Bi-Br-C-H-N
• nonmetal
• birefringent
• transitional
• non-disordered
• alkali
• orthorhombic
• tetragonal
• monoclinic
• trigonal
• hexagonal