Birefringent, Electronic and electrical properties, Trigonal

• Ni-O
• Li-Nb-O
• O-Pb-Zr
• Ga-La-O-Si
• B-Ba-O
• permittivity (dielectric constant)
• electronic energy gap
• values of electronic energy gap
• energy band structure
• electron density of states
• birefringent
• nonmetal
• chalcogen
• disordered
• non-disordered