A method is described for enantiomorphic space-group determination which depends upon a simple analysis of a single convergent-beam diffraction pattern. The method, which in principle may be applied to any enantiomorph, is here used to identify the space group of dextrorotatory [alpha]-quartz. In this, a four-beam pattern is analysed by visual matching to an analogue computer display.
Goodman, P., & Johnson, A. W. S. (1977). Identification of enantiomorphically related space groups by electron diffraction – a second method. Acta Crystallographica Section A, 33(6), 997-1001. https://doi.org/10.1107/S056773947700237X