Solid State 3D is an Android app that helps students of chemistry to visualize and understand all types of cubic unit cells, 2D and 3D packing, and different types of voids in 3D. The app covers three types of unit cells, five types of packing, and two types of voids.

The app provides a comprehensive overview of the types of unit cells, including primitive/simple cubic unit cells, body-centered cubic unit cells (bcc), and face-centered cubic unit cells (fcc). It also covers the types of packing, such as packing in one dimension, two dimensions, and three dimensions. Moreover, it explains the types of voids, including tetrahedral and octahedral voids.

Solid State 3D allows you to imagine the crystal lattice by visualizing all the unit cells. The purpose of making this app is to help students better understand the 3D shapes of unit cells, packing, and voids, which are usually studied in 2D in chemistry books.

Overall, Solid State 3D is a useful educational tool that provides an interactive experience for students to learn and visualize the complex concepts of cubic unit cells, packing, and voids.