<Li> Face - centered cubic (abbreviated cF or fcc, and alternatively called cubic close - packed or ccp) </Li> <P> Each is subdivided into other variants listed below . Note that although the unit cell in these crystals is conventionally taken to be a cube, the primitive unit cell often is not . This is related to the fact that in most cubic crystal systems, there is more than one atom per cubic unit cell . </P> <P> A classic isometric crystal has square or pentagonal faces . </P> <P> The three Bravais lattices in the cubic crystal system are: </P>

What is the coordination number of a cesium atom in the body-centered cubic structure of cesium