Legos are arranged to show the crystal structure of graphite
Understanding crystal structure helps researchers characterize new chemical solids and understand some of the unique properties of materials. Additionally, crystal structure provides insight into the interactions between materials. Polyhedral models, commonly used in inorganic or solid state chemistry, environmental or soil science, and geology, are useful for visualizing how atoms in a crystal bind and where they are located in relation to each other.
Links to the right provide more information and activities on this topic.