<Tr> <Th> Pearson symbol </Th> <Th> cP </Th> <Th> cI </Th> <Th> cF </Th> </Tr> <Tr> <Th> Unit cell </Th> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <P> The primitive cubic system (cP) consists of one lattice point on each corner of the cube . Each atom at a lattice point is then shared equally between eight adjacent cubes, and the unit cell therefore contains in total one atom (​ ⁄ × 8). The body - centered cubic system (cI) has one lattice point in the center of the unit cell in addition to the eight corner points . It has a net total of 2 lattice points per unit cell (​ ⁄ × 8 + 1). 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 (​ ⁄ × 8 from the corners plus ​ ⁄ × 6 from the faces). Each sphere in a cF lattice has coordination number 12 . Coordination number is the number of nearest neighbours of a central atom in the structure . </P> <P> The face - centered cubic system is closely related to the hexagonal close packed (HCP) system, and the two systems differ only in the relative placements of their hexagonal layers . The (111) plane of a face - centered cubic system is a hexagonal grid . </P>

Where are the lattice points in the unit cell of a body-centered cubic lattice
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