Solids are one of the three main states of matter, along with liquids and gases. In the field of research on solids, scientists study the physical and chemical properties of solid materials, as well as their behavior under different conditions like temperature, pressure, and stress. This research area encompasses a wide range of topics, including crystallography, material science, and condensed matter physics. Scientists in this field investigate the structure, composition, and properties of solid materials, with the aim of developing new materials with specific characteristics and applications. This research is crucial for advances in technology, including the development of new materials for electronics, construction, and medicine.