The Crystal? || The Seven Crystal Systems and 14 Bravais Lattices || Crystal physics || senthilkumar

There's more than one way to categorize a crystal. The two most common methods are to group them according to their crystalline structure and to group them according to their chemical/physical properties.
This is a very simplified view of crystal structures. In addition, the lattices can be primitive (only one lattice point per unit cell) or non-primitive (more than one lattice point per unit cell). Combining the 7 crystal systems with the 2 lattice types yields the 14 Bravais Lattices (named after Auguste Bravais, who worked out lattice structures in 1850).

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Good Teaching sir