The Sodium Chloride Structure
General Notes
NaCl has a cubic unit cell. It is best thought of as a face-centered cubic array of anions with an interpenetrating fcc cation lattice (or vice-versa). The cell looks the same whether you start with anions or cations on the corners. Each ion is 6-coordinate and has a local octahedral geometry
Structure
Shown below are two crystallographic planes in NaCl. Notice that the (111) plane is hexagonally closest packed
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