A comprehensive understanding of the crystal structure is indispensable in elucidating the physicochemical properties of crystalline solids. Our extensive experience has demonstrated that, particularly in industrially relevant systems, rapid reaction processes can frequently result in the formation of intricate structural phenomena, including polytypism, polysomatism, twinning, and modulated structures. The successful description of such complex systems requires a high degree of specialized crystallographic knowledge, which is available in the working group and makes us a valued cooperation partner at the national and international levels.