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**Molecular formula:** SiO₂
**Molar mass:** 60,085 g/mol
**Information:** Silica is a solid substance with a polymeric structure. The basic structural unit is a tetrahedral arrangement of SiO₄, in which the silicon atom is surrounded by four oxygen atoms.
**Use:** It has significant use in the construction industry. It is part of Portland's cement, which is the most used type of cement in the production of concrete and mortar. It also produces quartz glass, optical fibres, or porcelain.
**Occurrence:** In nature, it occurs in the form of quartz minerals.
