ABSTRACT
The German mathematician Hermann Weyl said that through symmetry, man always tried to perceive and create order, beauty, and perfection. For symmetry, we need to have symmetry elements and symmetry operations. A symmetry operation is the movement of a body around such symmetry element. The identity symmetry element exists in everything in the universe. A center of symmetry is a point in space that occupies a midpoint on a line connecting two indistinguishable positions. If a molecular configuration can be divided by a plane into two parts that are mirror image of each other, then the molecule possesses a symmetry plane. In order to consider spectroscopic investigation of solid-state materials, it is important to shed some light on the distinction between point groups as applied to molecules and point groups as applied to crystals. A glide plane symmetry element involves reflection across a plane of symmetry followed by a translation parallel to that plane.
