A compound `A_(x)B_(y)` crystallises on a fcc lattice in which A occupies each corner of a cube and B occupies the centre of each face of the cube. What is the formula of the compound ?

Explanation

`A_(x)B_(y)`
No. of corner particles `(x) = (1)/(8) xx 8 = 1`
No. of centre particles `(y) = (1)/(2) xx 6 = 3`
`A_(1)B_(3)`