... purity:99.99 2.density:2.20g/cm3 3.refractive index :1.46(0.05u) 4.transimssion band:0.20-9(um) Specifications4N Silicon ... component Si, not less than (%) 99.99Content of other elements, not more ... silicon nitride, silicon carbide, (silicon titanium, silicon aluminum) and other alloys, silicone, ceramics, electronics, military, chemical, and photovoltaic industries. 4n high purity silicon ...