• Melting point – $1700^0 C$
• Dielectric strength – $10^7$ V/cm
• Relative dielectric constant – 3.9
• Thermal expansion coefficient $– 5.6 x 10^{-7} / K$
• Molecules / $cm^3 – 2.3 x 10^{22}cm^3$
• Energy gap = 8 eV
• DC Resistivity $≅ 10^{17}$ ohm-cm