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. 2024 Feb 1;57(Pt 1):181–186. doi: 10.1107/S1600576724000207

Figure 2.

Two images A and B representing crystal structures. Image A is a continuation of Figure 1, with white marshmallows on the corners of the cube and a pink marshmallow suspended in the centre. Image B is a larger cubic array formed from 27 sweets, where 12 red jelly sweets are on all the corners and the centre of the faces, 12 green jelly sweets lie halfway along the edges, and 1 green jelly sweet is in the centre of the cube.

Illustration the extension of adding an additional marshmallow to the sweet crystal structure to represent a primitive cubic unit cell of a material, such as that of caesium chloride (A), and extension activity of constructing a sodium chloride structure (B).