TRIPLE: 1.36 &1.37 describe an ionic crystal as a giant three-dimensional lattice structure held together by the attraction between oppositely charged ions

Giant ionic lattice structure

As you can see from the diagram, this is a giant ionic lattice. When an ionic compound forms, the positively charged ions attract the negatively charged ions and arrange themselves into a three-dimensional structure called an ionic lattice. The arrangement of the ions in the ionic lattice of sodium chloride is shown above.