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Silicon, also known as silicon dioxide (from the Latin silex), is a chemical compound with the chemical formula SiO2. It has been known since ancient times.

Silicon occurs most commonly in nature in the form of quartz, and is also present in a variety of living organisms. Silicon is one of the most complex and abundant groups of materials, occurring as multiple minerals and also produced synthetically.

In the chemical industry, silica is also used as a filter aid in phosphoric acid plants to improve recovery efficiency. The Greenstar process involves the reaction of aluminum hydroxide with hydrofluorosilicic acid followed by filtration to recover silica.

Its main clients are the Vedanta Resources group and Coromandel companies.