A mixed oxide has ccp arrangement in which the cations ' $X$ ' occupy $1 / 3^{ ext {sd }}$ of octah

Question

A mixed oxide has ccp arrangement in which the cations ' $X$ ' occupy $1 / 3^{	ext {sd }}$ of octahedral voids and the cations ' Y ' occupy $1 / 3^{	ext {rd }}$ of tetrahedral voids. The formula of oxide is

Professor PC Thomas Classes · Answer

O is ccp (4 per unit cell). X in $1/3$ octahedral ($4/3$). Y in $1/3$ tetrahedral ($8/3$). Ratio X:Y:O = 1:2:3 $\Rightarrow \mathrm{XY}_2\mathrm{O}_3$. [FLAG: matching closest option D]