Cubic Close Packing
The third layer is different from the first and the spheres in the third layer lie on the other set of hollows marked ‘C’ in the first layer. This arrangement is called ABCABC…..type and in this also 74% of the available space is occupied by spheres. The cubic close packing has face centred cubic (fcc) unit cell. This arrangement is found in Cu, Ag, Au, Ni, Pt, Pd, Co, Rh, Ca, Sr.