Aluminium silicate (or
aluminum silicate) is a name commonly applied to chemical compounds which are derived from
aluminium oxide, Al
2O
3 and
silicon dioxide, SiO
2 which may be
anhydrous or hydrated, naturally occurring as
minerals or synthetic. Their chemical formulae are often expressed as xAl
2O
3.ySiO
2.zH
2O These include the compounds:-