A point at one corner of a unit cell is shared among eight unit cells in the lattice. One-eighth of a corner lattice point or one-eighth of a corner atom is located in each unit.
An atom on the face of the unit cell is shared with one other cell. One-half of a lattice point or an atom on a face is located in each unit cell.
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6
faces x 1/2 an atom at each face + 8 corners x 1/8 an atom at each corner
= 4 atoms per cell
One
half of an atom is located inside the unit cell in the middle of each face
One
eighth of an atom is located inside the unit cell at each corner
Copyright ©
2003
by: Journal of Chemical Education Software
by: Journal of Chemical Education Software