Question

In closest packing of atoms

• A. The size of tetrahedral void is greater than that of the octahedral void
• B. The size of the tetrahedral void is smaller than that of the octahedral void.
• C. The size of tetrahedral void is equal to that of the octahedral void.
• D. The size of tetrahedral void may be larger or smaller or equal to that of the octahedral void depending Upon the size of atoms.

Answer 1

The correct option is B

The size of the tetrahedral void is smaller than that of the octahedral void.

Limiting radius of tetrahedral void = 0.225 x r_anion

Limiting radius of octahedral void = 0.414 x r_anion