Figure 1
Plate (i) of IUCr Teaching Pamphlet 14, with the symmetry elements of the space group that has generated the orbit represented by the set of footprints. Axes, not shown in the original plate but described in the text, are oriented as in the first projection of each orthorhombic group, i.e. c is the projection direction, a is directed vertically down and b is directed horizontally right. |