half contribution, in addition to the corner lattice points, giving a total of four lattice points per unit cell ( × 8 from the corners plus × 6 from the faces).

The face-centered cubic lattice is closely related to the hexagonal close packed (hcp) system, where the two systems differ only in the relative placements of their hexagonal layers. The [111] plane of a face-centered cubic lattice is a hexagonal grid.

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