Category:Crystals in space group 180 or 181

This category lists crystals that display the symmetry of the P6$2$21 space group (No. 180) of the hexagonal crystal system, or the enantiomorphic space group P6$4$21 (No. 181). The element or compound can assume either one of these two space groups.

The crystal being referred to may be just one of the possible forms of a named element or compound.