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Silica Mineral
30
Jun
Jun
Silica mineral, any of the forms of silicon dioxide (SiO2), including quartz, tridymite, cristobalite, coesite, stishovite, lechatelierite, and chalcedony. Various kinds of silica minerals have been produced synthetically; one is keatite. General considerationsSilica minerals make up approximately 26 percent of Earth’s crust by weight and are second only to the feldspars in mineral abundance. Free […]
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