Sericite (Sericite) is a natural fine-grained muscovite, is a subspecies of muscovite is layered silicate, silicon-oxygen tetrahedron structure sandwiched by two layers of aluminum octahedral layer compound composed of silicon oxygen layer. 
 Sericite is monoclinic crystal, crystal scaly, with silky luster (shiny glass muscovite was), the pure block gray, purple pink, white, radius to thickness ratio> 80, the proportion of 2.6 to 2.7, hardness 2 3, flexible, flexible, abrasion resistance and good wear resistance; heat insulation, insoluble in acid solution, chemically stable. 
 Application; coatings [architectural coatings, fire-resistant coating; heavy duty coating, paint, etc.]; metallurgical casting [BF stemming raw materials]; welding; engineering rubber; insulation materials; friction materials [automobile brake system products, raw materials] ; cosmetics; ceramics [color glaze. billet]; building materials [waterproof membrane. gypsum board. Asphalt Felt]; insulating materials; paper;