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  4. An example of a cyclic silicate is

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Q. An example of a cyclic silicate is

Rajasthan PMTRajasthan PMT 2011

Solution:

If two oxygen atoms per tetrahedron are shared to form closed rings such that the structures with the general formula $ (SiO_{3}^{2-}) $ or $ (Si{{O}_{3}})_{n}^{2n-} $ are obtained, the silicates containing these anions are called cyclic silicates. For example, in beryl $ (B{{e}_{3}}A{{l}_{2}}S{{i}_{6}}{{O}_{18}}) $ the anion $ S{{i}_{6}}O_{18}^{12-} $ is cyclic silicate.

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