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glide plane

glide plane

A symmetry element of the crystallographic space group. When a crystal is mirrored with respect to a certain crystal plane (mirror plane) and successively translated parallel to this mirror plane by a length of 1/2 or 1/4 of the crystal unit-cell, the translated crystal can be equivalent to the original crystal. In this case, this plane is called "glide plane." The glide planes are denoted by g, instead of m in the case of mirror planes.

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