In a face centred cubic lattice, atom A occupies the corner positionsand atom B occupies the face centre positions.If one atomof B is missing from one of the face centred points.

In a face centred cubic lattice, atom A occupies the corner positionsa

1.	In a face centred cubic lattice, atom A occupies the corner positionsand atom B occupies the face centre positions.If one atomof B is missing from one of the face centred points.
Answer» `A_(2)B` `AB_(2)` `A_(2)B_(3)` `A_(2)B_(5)` Solution :NUMBER of atoms of A per unit cell =`8times1/8=1` Number of B atoms per unit cell =`(6-1)/2=2.5` Formula of the compound =`A_(1)B_(2.5)orA_(2)B_(5)`