 Hermann–Mauguin notation

Hermann–Mauguin notation, also known as the international notation or Schoenflies notation, is a system used in crystallography to describe the symmetry and properties of crystal structures. This notation helps categorize crystals based on their symmetry operations, such as rotations, reflections, and inversions, allowing scientists to communicate the structural characteristics of different crystalline materials succinctly. In Hermann–Mauguin notation, a crystal system is represented by a unique symbol that combines letters and numbers.