In a crystal structure, we can think about the unit cells, which are the smallest repeating unit of the structure. You can see 2 different (equally valid) unit cells (the shaded cubes), each of which ...In a crystal structure, we can think about the unit cells, which are the smallest repeating unit of the structure. You can see 2 different (equally valid) unit cells (the shaded cubes), each of which has an ion at each corner of the unit cell box, and the other ion in the center of the box. There are different names for unit cells with particular shapes, but you don't need to learn them now, except for cubic, which means that the sides are the same and all the angles are 90°.
