Question

In a compound $X{Y}_2{O}_4$ oxide ions are arranged in ccp structure. Cation X are present in octahedral voids and cation Y are equally distributed between octahedral and tetrahedral voids. The fraction of the octahedral voids occupied is:

• A. $\frac{1}{4}$
• B. $\frac{1}{2}$
• C. $\frac{1}{8}$
• D. $\frac{1}{6}$

Answer 1

The correct option is B $\frac{1}{2}$

Number of ions = 4
Number of atoms present in octahedral voids = 2

Fraction of octahedral voids occupied $=\frac{2}{4}=\frac{1}{2}$.