We'd like to use analytics cookies to understand which symbols people look up, so we know what to research next. They are not used for advertising and we set none of them unless you say yes. What we store.
Names and axis descriptions classifying a crystal's symmetry.
Also known as: Crystal class, Bravais lattice notation
Crystals are classified into seven systems by the symmetry of their axes — cubic, tetragonal, orthorhombic, monoclinic, triclinic, hexagonal, trigonal. The classification is about internal structure, so two minerals can look alike and belong to different systems.
Classify a crystal by the symmetry and relative lengths of its axes into one of seven systems.
Contexts: Technical drawing, Maps
Describe internal atomic structure rather than external appearance, so two specimens of similar shape can belong to different systems.
Contexts: Technical drawing, Maps
A named system with three or four axis lines drawn at characteristic angles and lengths.