aluminium silicate

noun1

1. •
   A chemical compound composed of aluminium, silicon and oxygen, chemical formula Al₂SiO₅, found in minerals and clays in several forms and used commercially as food additive E559 as an anticaking agent.

   • One of the most famous diagrams in geology is a profoundly simple one that shows the different conditions required to grow one of three mineral varieties of aluminium silicate. — 2004