Q.
Silicate structure unit of
A) $\left( Si_{4}O_{11} \right)_{n}^{- 6n}$
B) $\left( Si_{2}O_{11} \right)_{n}^{- 2n}$
C) $(Si_{2}O_{3})$
D) $\left( SiO_{4} \right)^{- 4}$
Explanation
(a)
Chain silicates Double chain silicates can be formed when two simple chains are joined together by shared oxygens. These minerals are called amphiboles, and they are well known. The most numerous and best known amphiboles are the asbestos minerals. These are based on the structural unit $\left( Si_{4}O_{11} \right)_{n}^{6n -}$. The structure of amphiboles is
[image:11_image9.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.