Silicon dioxide

Appearance：colorless transparent particles

Density:2.202grams per cubic centimeter

Friction hardness:5.5

Melting point:1700℃

Solubility: insoluble in water,soluble in acid

Light transmission range:200-2000nm

Refractive index（500nm）：1.46

Evapration condition :electron  gun evapration

Evapration temperature:1800-2200℃

Purity:99.99%