Cesium bromide packs into a regular pattern in a three dimensional lattice. The unit cell is the smallest repeating unit of an ionic packing structure. The packing for an ionic compound is often defined by the regular packing of one of the ions. Use the following picture to identify the best description of the packing of the bromide ions (red). A) Simple Cubic B) Body Centered Cubic C) Face Centered Cubic D) Hexagonal Closest Packed