Aluminum silicate is used to prepare aluminum-silicate polymer composite (PASiC), which is an inorganic coagulant used in water treatment. It is used as a catalyst for the pyrolysis of rice husk to crude bio -oil, which upgraded to supercritical ethanol. Further, it is used as filler in paper, rubber and in paints.
Any of the numerous types of clay which contain varying proportions of Al 2 O 3 and Si O 2 . Made synthetically by heating aluminum fluoride at 1000–2000C with silica and water vapor; the crystals or whiskers obtained are up to 1 cm long, have high strength, and are used in reinforced plastics.