Description

Technical Specifications and more details of Kaolin Clay Stone are given below : Other Details: Kaolin is a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet linked through oxygen atoms to one octahedral sheet of alumina octahedral. Rocks that are rich in kaolinite are known as kaolin or china clay. Kaolinite has a low shrink–swell capacity and a low cation-exchange capacity (1–15 meq/100 g). It is a soft, earthy, usually white mineral (dioctahedral phyllosilicate clay), produced by the chemical weathering of aluminium silicate minerals like feldspar. In many parts of the world, it is colored pink-orange-red by iron oxide, giving it a distinct rust hue. Lighter concentrations yield white, yellow or light orange colors. Alternating layers are sometimes found, as at Providence Canyon State Park in Georgia, United States. Commercial grades of kaolin are supplied and transported as dry powder, semi-dry noodle or as liquid slurry. Compositions: Physical Analysis: Color White, sometimes red, blue or brown tints from impurities Tenacity Flexible but inelastic Mohs scale 02/02/05 Luster Pearly to dull earthy Specific Gravity 2.16-2.68 gm/cc Bulk Density 1.2-1.4 gm/cc Refractive Index nα = 1.553–1.565, nβ = 1.559–1.569, nγ = 1.569–1.570 Crystal Habit Rarely as crystals, thin plates or stacked, More commonly as microscopic pseudo hexagonal plates and clusters of plates, aggregated into compact, clay like masses Crystal System Triclinic Optical Properties Biaxial (-) Chemical Analysis: Elements Results % SiO2 44.84 Al2O3 38.28 Fe2O3 0.36 CaO 0.33 MgO 0.82 TiO2 0.72 Loss on ignition (LOI) 14.2 Alkalis & undermined Below 1