👉 Subgranularity is a concept in materials science and engineering that refers to the smallest unit of material that can be characterized by its atomic structure or chemical composition. It typically takes the form of a single atom or molecule, but it can also include other smaller particles such as atoms or molecules within a larger unit. In subgranular materials, the size of the particles is often less than 10-5 to 10-6 meters (or more precisely, 10^-10
