Sand Silica
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Sand silica (or silica sand) is a natural mineral material composed primarily of silicon dioxide (SiO₂). It is one of the most common forms of silica found in nature, usually in the form of quartz.
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Origin and Form
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Origin: Naturally formed from the weathering of quartz-containing rocks, such as granite and sandstone. 
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Physical form: Fine to coarse grained, white to yellowish in color. 
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Other names: often called quartz sand or white sand. 
Chemical Composition
The main component is SiO₂ (silicon dioxide), usually with a purity between 90-99.9%, depending on the source and leaching process.
In addition, there are small amounts of other ingredients such as:
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Fe₂O₃ (iron oxide) 
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Al₂O₃ (alumina) 
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TiO₂ (titanium dioxide) 
Uses of Silica Sand
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Glass industry: the main ingredient for making glass, bottles, and fiber glass. 
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Metal casting industry: as molding sand (foundry sand). 
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Cement & concrete industry: as a filler or additive to strengthen the mixture. 
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Water filter: used in water filtration systems due to its inert and porous nature. 
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Abrasives: used in sandblasting and metal surface cleaning. 
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Electronics: as a base material for silicon in the manufacture of semiconductor chips (after further purification). 
Safety Notes
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Long-term exposure to silica dust can cause lung diseases such as silicosis. 
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Therefore, in industry, workers are required to use protective masks and good ventilation systems. 
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