Perfect twinning and the additional twin laws can result in a diffraction pattern and space group with a higher apparent symmetry than the true crystal symmetry. Twinning can also be determined by comparing the Rint values of the true Laue group with those of the apparent Laue group. The Rint (as calculated in Shelx XPREP) will be lower for the true space group. The results of this analysis are shown below Figure . As can be seen, in all the cases, the Rint for the high symmetry 622 is lower than that of the lower symmetry Laue group. This indicates that the higher symmetry of group P622 is indeed true and not an artifact of twinning in lower symmetry. Combined with the results of the cumulative intensity plots, we are confident that our unusual stellate crystals are single. Table