The coordination number of the sphere in cubic close packed (ccp) structure is
The coordination number of the sphere in cubic close packed (ccp) structure is
6
4
12
8
Solution
In cubic close packing the atoms are present at corners and face center of the unit cell.
As the atom present at face center touches 12 atoms of face centers. 4 in its plane, 8 outside the plane.
hence the co- ordination number is 12 .
