The following symmetry elements are shown in the figure:

centre of inversion | ||

2_{1}^{ } screw axis
(parallel to c) |
||

2_{1}^{ } screw axis
(parallel to a) |
||

2_{1}^{ } screw axis
(parallel to b) |
||

a glide plane
(perpendicular to c) |
||

mirror plane
(perpendicular to a) |
||

n glide plane
(shown vertical and perpendicular to b) |

© Copyright 1995-2006. Birkbeck College, University of London. |
Author(s):
Jeremy Karl Cockcroft |