SILICA DUST, CRYSTALLINE, IN THE FORM OF QUARTZ OR CRISTOBALITE
The various forms of crystalline silica are: α-quartz, β-quartz, α-tridymite, β-tridymite, α-cristobalite, β-cristobalite, keatite, coesite, stishovite, and moganite (NIOSH, 2002). ... Although silica sand has been used for many different purposes throughout history, its most ancient and principal use has been in the manufacture of glass ...
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