What is NOT a feature of a crystalline lattice?

A crystalline lattice is characterized by its ordered and repeating arrangement of atoms, ions, or molecules. This order is what gives crystalline materials their unique physical properties. The features of a crystalline lattice include a periodic arrangement, which indicates that there is a consistent pattern that repeats in three-dimensional space. This periodicity is crucial as it leads to the predictable properties seen in crystals.

Furthermore, a definite structure is a hallmark of crystalline materials, allowing them to have specific geometrical shapes and well-defined angles between different planes. Symmetric properties are also a feature of crystalline lattices, reflecting how the arrangement of particles can exhibit symmetry across different axes, resulting in regular shapes like cubes or hexagonal forms.

In contrast, random orientation does not apply to crystalline lattices. Random orientation is characteristic of amorphous materials, where the structure lacks the long-range order found in crystalline forms. Therefore, it is the absence of a regular pattern or orientation in the atomic arrangement that distinguishes amorphous materials from crystalline materials.