The face-centered cubic system (cF) has lattice points on the faces of the cube, that each gives exactly one half contribution, in addition to the corner lattice points, giving a total of 4 lattice points per unit cell ( 1⁄ 8 × 8 from the corners plus 1⁄ 2 × 6 from the faces). It has a net total of 2 lattice points per unit cell ( 1⁄ 8 × 8 + 1). The body-centered cubic system (cI) has one lattice point in the center of the unit cell in addition to the eight corner points. Each atom at a lattice point is then shared equally between eight adjacent cubes, and the unit cell therefore contains in total one atom ( 1⁄ 8 × 8). The primitive cubic system (cP) consists of one lattice point on each corner of the cube. The three Bravais lattices in the cubic crystal system are:
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