Structure of sodium chloride

The sodium chloride structure

The x-ray analysis of crystal structures show that sodium chloride consists of a regular three-dimensional assembly of Na⁺ and Cl^– ions.

Each sodium ion is surrounded by six Cl^– ions as its neighbors and each Cl^– is surrounded by six Na⁺ ions.  Therefore, both the sodium ion and chloride ions in the structure have a coordination number of six. Sodium chloride is an ionic compound that conducts electricity in molten and solution forms.

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