| http://www.w3.org/ns/prov#value | - Relatively high-silica aluminosilicates, as used herein, can advantageously include those having a molar relationship of X2O3:(n)YO2 (wherein X is a trivalent element and Y is a tetravalent element), in which n is at least about 80, preferably at least about 100, for example at least about 120, at least about 150, at least about 180, or at least about 200, and typically not more than about 5000, p
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