Which statement is wrong?

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Question

(D) $1$. Beryl $(Be_3Al_2Si_6O_{18})$ is a well-known example of a cyclic silicate (metasilicate) where six $SiO_4$ tetrahedra are linked in a ring.$2

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Feldspars are not aluminosilicates.

Vedclass · Answer

(D) $1$. Beryl $(Be_3Al_2Si_6O_{18})$ is a well-known example of a cyclic silicate (metasilicate) where six $SiO_4$ tetrahedra are linked in a ring.$2$. $Mg_2SiO_4$ (Forsterite) is an orthosilicate (nesosilicate) containing discrete $SiO_4^{4-}$ units.$3$. The basic structural unit of all silicates is the $SiO_4^{4-}$ tetrahedron.$4$. Feldspars are three-dimensional tectosilicates where some silicon atoms are replaced by aluminum atoms,making them aluminosilicates. Therefore,the statement that 'Feldspars are not aluminosilicates' is incorrect.

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