| http://www.w3.org/ns/prov#value | - The chemical formula for a zeolite known as zeolite Y, expressed in terms of moles of oxides, may be written as: 0.9???0.2 Na2O:Al2O3:wSiO2:xH2O, wherein w is a value greater than about three up to about six, and x may be a value up to about nine.
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