Question

In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells:-
AIPMT-2005

Answer 1

All the faces of the face-centered unit cell are shared by 6 unit cells.
4 face are covered by 4 unit cells as shown in figure. The front and back face are also covered by 2 unit cell.
$\Rightarrow$ Total of 6 unit cells