The porosity for cubical packing (the least compact arrangement) is 47.6 per cent, and that for rhombohedral (the most compact arrangement) is 25.96 per cent.

• 立方形堆积(最不松散的堆积)的孔隙度为47．6%25，菱形堆积(最紧密堆积)的孔隙度为25.；96%25。