NaCl cubic structure animation

Solid State Physics

NaCl Crystal Structure

Rock salt structure — two interpenetrating FCC lattices offset by ½a. Each ion is octahedrally coordinated by 6 ions of opposite charge.

Na⁺  Sodium (larger, orange)

Cl⁻  Chloride (smaller, blue)

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Crystal System

Cubic _(FCC)

Space Group

Fm_3̄m

Coordination

6 : 6 _(octahedral)

Lattice Parameter

5.64 _Å

Formula Units

4 _{per cell}

Bond Type

Ionic

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