A unit cell consists of a cube in which there are anions Y at each corner and cations X at the centre of alternate faces of the unit cell. What is the simplest formula of the compound ?

Explanation

Per Unit Cell,
No. of anions, `Y=8xx1/(8)=1`
No. of cations, `X=3xx1/(2)`
(Out of six face centres of the cube only three are occupied)
`therefore` Formula of Compound `=X_(3//2)YorX_(3)Y_(2)`