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Figure 6
Differences observed between partial mero­hedral and perfect merohedral twinning. A HKLVIEW (Collaborative Computational Project, Number 4, 1994BB5) of the pseudo-precession photograph of the diffraction pattern of the crystals of XAT. The diffraction pattern indicates no apparent symmetry. The observed diffraction appears to be normal with a threefold symmetry. Because the observed intensities of the twin-related reflections are not equal, the diffraction pattern does not acquire an additional symmetry unlike in the case of perfect twinning. Therefore, it is very difficult to recognize partial merohedral twinning from the observed diffraction pattern.

Journal logoBIOLOGICAL
ISSN: 1399-0047
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