👉 Crystallography is a branch of physics that studies crystals, which are solid or liquid structures composed of atoms arranged in a regular pattern. It involves observing and analyzing crystal structures using different techniques such as X-ray diffraction and neutron scattering to understand the physical properties of matter at the atomic scale. Crystallophrisson refers to the phenomenon where light from a single source is observed to be spread out and appear as a series of tiny, overlapping rings or dots in the crystal lattice of a crystal