Question

Amphibole silicate structure has 'x' number of corner shared per tetrahedron.The value of 'x' is :

• A. 2
• B. $2\frac{1}{2}$
• C. 3
• D. 4

Answer 1

The correct option is B $2\frac{1}{2}$

Amphibole silicate structure has 'x' number of corner shared per
tetrahedron.The value of 'x' is $2\frac{1}{2}$. They are double strand cross linked chains of composition $(S{i}_4{O}_{11}{)}_n^{6-}$. Example include tremolite (asbestos). In amphibole structure, two simple chains are joined together through the third oxygen atom of silicon tetrahedra $(Si{O}_4{)}^{4-}$. In each of the simple chain, two oxygen atoms per tetrahedra are shared.