Question

Empirical formula of Two-dimensional sheet silicates is:

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

The sharing of three oxygen atom per $Si{O}_4$tetrahedra results in a two-dimensional sheet of empirical formula $(S{i}_2{O}_5{)}_n^{2n-}$. The repeating unit of $S{i}_6{O}_{18}$ rings is characteristic of each sheet. Individual layers are bonded to each other by electrostatic forces involving the cation present. These forces are weaker than the forces within each sheet and are exerted over much larger distance, so the mineral cleave into thin sheet.