Question

Which of the following statement is/are correct for double chain silicates?

• A. There are two types of tetrahedra: those sharing 2 vertices and those sharing only 1 vertices.
• B. There are two types of tetrahedra: those sharing 3 vertices and those sharing only 2 vertices.
• C. There are only one type of tetrahedra.
• D. None of the above

Answer 1

The correct option is B There are two types of tetrahedra: those sharing 3 vertices and those sharing only 2 vertices.

The general formula of double chain silicates is $\left[\right(S{i}_4{O}_{11}{)}_n^{6n-}].$ Two simple chains are joined together by shared oxygen. There are two types of tetrahedra: those sharing 3 vertices and those sharing only 2 vertices.

Hence, correct option is b.