It often occurs intermixed with chlorite, muscovite, illite, cookeite, and kaolinite. Rocks that are rich in kaolinite are known as kaolin or china clay. The common clay minerals are montmorillonite or smectite, illite, and kaolinite or kaolin. Metakaolin is the anhydrous calcined form of the clay mineral kaolinite. The physilicates identified included aluminum smectite, iron/magnesium smectite, kaolinite, prehnite, and chlorite. Typically there are four main groups of clay minerals&colon; kaolinite, montmorillonite-smectite, illite, and chlorite. Purbeck ball clay is composed of kaolinite, mica and quartz. An example is porcelain, which is based on the silicate mineral kaolinite. White paint is usually created from natural chalk, kaolinite clay or diatomaceous earth. The surfaces of kaolinite, allophane and iron and aluminium oxides often carry positive charges. The clay minerals represented are largely kaolinite, montmorillonite and illite. A common component of clay bodies is the mineral kaolinite. It can occur intermixed with dickite, kaolinite, montmorillonite and other clay minerals. Low-temperature synthesis of clay minerals (with kaolinite as an example) has several aspects. The original active ingredients were kaolinite and pectin.