... hexagonal prism.hardness 2-3 ,specific gravity 2.70-3.20. mica powder have special acid-base resistance , chemical stability, also ... filler of plastic,coating agent,paint,rubber,can improve the mechanical strength,increase toughness,adhesive force,anti-aging and corrosion resistance ... )20%Calcium oxide (CaO)1.8%Titanium dioxide (TiO2)0.04%Iron oxide (Fe2O3)0.06%Water content (H2O)0.25% High quality ...