Density:2.60grams per cubic centimeter

Melting point:990℃

Light transmission range:200-1500nm

Refractive index（500nm）：1.3

Evapration condition : electron  gun evaporation or tungsten boat 、 molybdenum boat 、tantalum boat heating boat evaporation

Evapration temperature: 1704℃

Purity:99.99%