... , with the chemical composition Al2Si2O5(OH)4. Kaolinite is a clay mineral, part of the group of industrial minerals, with the ... ] Rocks that are rich in kaolinite are known as china clay, white clay, or kaolin.Kaolin is used in ceramics, medicine, coated paper ... food additive, in toothpaste, as a light diffusing material in white incandescent light bulbs, and in cosmetics. It is generally the ...