| http://www.w3.org/ns/prov#value | - about 5 to less than about 25, usually from about 10 to less than about 20, more usually from about 13 to about 18. hi the as-synthesized form, the material has a formula, on an anhydrous basis and in terms of moles of oxides per n moles of YO 2 , as follows: (0-2)M 2 O: (l-2)R:X 2 O 3 :(n)YO 2 , wherein M is an alkali or alkaline earth metal, and R is an organic moiety.
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