Question

find out the number of atoms per unit cell in a face - centred cubic structure having only single atoms at its lattice point

Answer 1

in face centered cubic structure,each face has an atom.so in that cell contribution of atoms are 6 X 1/2= 3
one at lattice point
so total 4 atoms are shared .

Answer 2

Answer:

face-centred cubic (fcc) unit cell contains atoms at all the corners and at the centre of all the faces of the cube. unit cells and only1/2 of each atom belongs to a unit cell. Therefore, total number of atoms per unit cell = 4 atoms.