Question

The general formula of double chain silicates is:

• A. $Si{O}_4^{4-}$
• B. $S{i}_3{O}_9^{2-}$
• C. $S{i}_2{O}_7^{6-}$
• D. $(S{i}_4{O}_{11}{)}_n^{6n-}$

Answer 1

The correct option is D $(S{i}_4{O}_{11}{)}_n^{6n-}$

The general formula of double chain silicates is $(S{i}_4{O}_{11}{)}_n^{6n-}$. Two simple chains are joined together by shared oxygen. Also known as amphiboles. Hence correct option is d.