A simple cubic structure is a type of crystal lattice where atoms are arranged in a cube shape. In this arrangement, one atom is located at each of the eight corners of the cube. Each corner atom is shared among eight adjacent cubes, resulting in an effective contribution of one atom per unit cell. This structure is one of the simplest forms of crystal packing and is found in some metals, such as polonium. However, it is less common than other structures like face-centered cubic or body-centered cubic, which offer more efficient packing and greater stability.