A cubic lattice is a point lattice with a conventional unit cell in the shape of a cube.
There are three types of cubic lattices, simple cubic (SC), body-centered
cubic lattice (BCC), and face-centered cubic (FCC). The term is also used more
specifically for the simple cubic point lattice
whose points have Cartesian
coordinates 
,
where 
,
, and 
are integers.
The illustrations above show the Brillouin zones for these three types of point lattice. Packing equal spheres as densely as possible with their centers on a face-centered cubic lattice gives cubic close packing. Sphere packings on simple cubic and body-centered cubic lattices are not close-packed.
