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CsCl is therefore a simple cubic unit cell of Cl-ions with a Cs+ in the center of the body of the cell. The face-centered cubic unit cell also starts with identical particles on the eight corners of the cube. But this structure also contains the same particles in the centers of the six faces of the unit cell, for a total of 14 identical lattice points. The body-centered cubic unit cell is the simplest repeating unit in a body-centered cubic structure.