👉 A tetrahedrite is a type of crystal structure in which all atoms are located at the vertices of a triangular lattice. It is composed of 4 tetrahedral units (tetras) and 6 face-sharing octahedra, each with 8 atoms. The tetrahedrite has a hexagonal symmetry, with its edges parallel to the faces of the structure. Tetrahedrites are commonly found in minerals such as feldspar, quartz, and calcite,
