kristallile omane struktuur, milles on aatomite korrapärane paigutus, nt metallide ja sulamite aatomite/sfääride pake (vrd kristalliline struktuur), the whole assemblage of rows and patterns of atoms, which have a definite arrangement in each crystal; the arrangement of most pure metals may be imitated by packing of spheres, and the same applies to many of the constituents of alloys (compare: crystalline structure)