In hcp arrangment in three dimensions, the overall coordination number of each sphere is

In a cubic close packing of spheres in there dimensions the coordination number of each sphere is:

When over a two-dimensional square packing same layers are kept in the way so that the centers are alligned in all three dimensions, coordination number of each sphere is

The coordination number in hcp is

The coordination number in hcp is

Whenever two-demiensional square packing same layers are kept in the way so that the centres are aligned in all three dimensation, coordination numberof each sphere is

Whenever two-demiensional square packing same layers are kept in the way so that the centres are aligned in all three dimensation, coordination numberof each sphere is