Birefringent, Nonmetal, Trigonal

• Ni-O
• Li-Nb-O
• Ga-La-O-Si
• C-Ca-O
• B-Ba-O
• optical properties
• electronic and electrical properties
• structural properties
• thermal and thermodynamic properties
• mechanical properties
• nonmetal
• birefringent
• chalcogen
• disordered
• non-disordered