One interesting feature of colloidal particles is the fact that they can crystallize into a broad array of different crystal structures, depending on their interactions. This process is highly similar to what happens when molecules or atoms crystallize, and is governed by the same statistical mechanics. However, unlike atoms or molecules, colloidal particles are typically polydisperse: they slightly vary in terms of their size, shape, charge, or other microscopic properties. This polydispersity typically hinders crystallization, but can also lead to the emergence of unexpectedly complex crystal structures [1]. In this project, you will explore how polydispersity with different size distributions leads to the formation of new crystal structures.