HS CODE 25070021
Kaolinite is a clay mineral, with the chemical composition Al?Si?O?(OH)?. It is an important industrial mineral. It is a layered silicate mineral, with one tetrahedral sheet of silica linked through oxygen atoms to one octahedral sheet of alumina octahedra.
Luster: Pearly to dull earthy
Optical properties: Biaxial (–)
Specific gravity: 2.16–2.68
Crystal class: Pedial (1); (same H-M symbol)
Crystal system: Triclinic
Kaolin, also called china clay, soft white clay that is an essential ingredient in the manufacture of china and porcelain and is widely used in the making of paper, rubber, paint, and many other products.