A substance A_(x)B_(y) crystallizes in a face centred cubic (FCC) lattice in which atoms 'A' occupy each corner of the cube and atoms 'B' occupy the centres of each face of the cube. Identify the correct composition of the substance A_(x)B_(y)

A substance A_(x)B_(y) crystallizes in a face centred cubic (FCC) latt

1.	A substance A_(x)B_(y) crystallizes in a face centred cubic (FCC) lattice in which atoms 'A' occupy each corner of the cube and atoms 'B' occupy the centres of each face of the cube. Identify the correct composition of the substance A_(x)B_(y)
Answer» `AB_(3)` `A_(4)B_(3)` `A_(3)B` composition cannot be specified Solution :A at corner `= (1)/(8) xx 8 xx A = A` ltrbgt B at face CENTER `= (1)/(2) xx 6 xx B = 3B = AB_(3)`