Crystalline silica
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Silica (silicon dioxide) is a naturally occurring mineral composed of silicon and oxygen making up 90% of the earth's crust. Silicon dioxide can exist in both crystalline and amorphous forms. The three most common crystalline forms are quartz, cristobalite and tridymite – all interrelated and able to change form under different...Explore the subscription options here to get full access to isurv, including downloads.
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