1.Flakes1-3mm,3-6mm,10-20mesh 2.Powder 100-1250mesh 3.USD400-800/MT 4.Process:dry and wet method 5.Pure biotite material Series: Muscovite, Phlogopite, biotite, sericite, wet ground and dry groundSize: 20mesh, 40mesh, 60mesh, 80mesh, 100mesh, 200mesh, 325-2000mesh, or accoring to customers' requirements. 1.Chemical property: ChemicalCompositionSiO2Al2O3K2ONa2OMgOFe2O3TiO2S+ ...