Face Centred Cubic

A crystal structure found in some of the common elemental metals; within the cubic unit cell atoms are located at all corner and face-centered positions. Roughly 20% of the elements crystallize with face centred cubic structures.

Volume of conventional cella3
Lattice points per cell4
Volume of primitive cell1/4a3
Lattice points per unit volume4/a3
Number of nearest neighbours12
Nearest neighbour distancea/21/2
Number of second neighbours6
Second neighbour distancea
Packing fraction1/6π21/2

See also: Body Centred Cubic, Crystal, Hexagonal Close Packed, Simple Cubic, Unit Cell.

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Subjects: Chemistry Physics