The unit cell of a binary compound of A and B has ccp structure with A atoms occupying the corners and B atoms occupying the centres of each face of the unit cell. If during crystallisation of the alloy, in the unit cell two atoms of A are missing, the overall composition per unit cell is :

Options

A. `AB_(6)`
B. `AB_(4)`
C. `AB_(8)`
D. `A_(6)B_(24)`

Answer

B

Explanation

Number of atoms of `A=6xx1//8=3//4`
Number of atoms of `B=6xx1//2=3`
`A:B=3//4:3=3:12`
Composition of Alloy `=AB_(4)`