sericite in powder

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 2.6-2.7, hardness 2 -3, flexible, flexible, abrasion resistance and good wear resistance; heat insulation, insoluble in acid solution, chemically stable.