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n4google.com.
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An amorphous hydrated silicate can be expressed by the general formula: x(Ma Ob).y(SiO2).nH2 O, wherein M is a metal such as B, Be, Mg, Ca, Ba, Al, Zn, Ti, Zr and Sn; a is 1 or 2; b is 1, 2 or 3; n>0; x???0; and y???0.
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