+A **Space Group** is a mathematical classification describing the complete set of [Symmetry](/wiki/symmetry) operations that leave a 3D [Crystal](/wiki/crystal) structure invariant. It uniquely combines point group symmetries like rotations and reflections with translational symmetries, illuminating the fundamental order within materials.
+## See also
+- [Point Group](/wiki/point_group)
+- [Lattice](/wiki/lattice)
+- [Crystallography](/wiki/crystallography)
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