In which of the following silicates, only two corners per tetrahedron are shared ?
I. Pyrosilicate
II. Cyclic silicate
III Double chain silicate
IV Single chain silicate
V 3D Silicate

Options

A. (i),(ii) and (iv)
B. (iv) and (vi) only
C. (i) and (vi) only
D. (ii) and (iv) only

Answer

D

Explanation

(i) Pyro silicates :(1 corners O-atom per tetrahedron is shared)
(ii) Cyclic silicates : (2 corners O-atom per tetrahedron is shared)
(iii) Double chain silicates (One unit shares two corner O-atom while one unit shares three corners O-atom)
(iv) Single chain silicate : (2 corner O-atom are shared)
(vi) sheet silicates: (3 coner O-atom are shared).