The introduction of silica fume is introduced to you

The molecular form of wollastonite is Ca3 [Si3O9]. Triclinal system, belonging to a single chain silicate mineral. It is usually lamellar, radial or fibrous. White microstrip gray. Vitreous luster, pearl luster on cleavage surface. Hardness 4.5 ~ 5.0. Cleavage parallel to {100}, completely parallel to {001} medium, two groups of cleavage plane Angle is 74 °. Density 2.78 ~ 2.91 g/cm3. Mainly produced in the contact metamorphic zone between acid intrusive rocks and limestone, it is the main mineral composition of skarn. It is also found in some deep metamorphic rocks. Used as raw materials or fillers for papermaking, ceramics, cement, rubber, plastics, etc. Gas filtration materials and heat insulation materials; Metallurgical flux, etc.

J. Leman was named in 1818 in honor of William Hyde Wollaston[August 6, 1766 East Dereham, Norfolk, England, United Kingdom -- December 22, 1828 London, England, United Kingdom, British chemist and mineralogist who discovered palladium in 1804, rhodium in 1809, Reflection goniometer was invented in 1809 and camera lens was invented in 1812.