Diatomaceous earth
Fossil flour
Infusorial earth
O 2%, Si 1%,

estimated elemental composition and empirical formula weight 
Minerals with the same name may vary widely in appearance and composition, and very few are >99% (reagent grade) pure.

Gram formula weight (molecular mass) = 60.084
Solubility in organics = insoluble

Minerals may vary in elemental composition and impurity levels.
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is defined with respect to the entities below:
The entities below are defined with respect to:
Mineral (generic)

Silicon dioxide

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