Abstract
STEEDS et al. have published pictures showing effects of upperlayer interactions in molybdenite1,2. Because of its use in structure analysis it seems worthwhile to set down rules from the literature which relate electron diffraction symmetries to three-dimensional crystal symmetries. As distinct from problems which can be solved by considering only zero-layer interactions, such as the determination of a polar axis in the plane of projection3,4, the total crystal symmetry, including the boundaries, must be considered when upper-layer interactions are important. As a simple example some results obtained from a highly tilted crystal are given, and I also comment on the conclusions of Steeds et al.1,2.
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GOODMAN, P. Role of upper-layer interactions in electron diffraction symmetries. Nature 251, 698–701 (1974). https://doi.org/10.1038/251698a0
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DOI: https://doi.org/10.1038/251698a0
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