Kaolinite is a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4. Kaolinite is ... a clay mineral, part of the group of industrial minerals, with the chemical composition Al2Si2O5(OH)4. It is ... , as a food additive, in toothpaste, as a light diffusing material in white incandescent light bulbs, and in cosmetics. It is generally the ...