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Figure 23
Two ways of indexing the tetragonal lattice in point group 4, with the fourfold axis directed `up' or `down'. These two ways are not equivalent, since reflections with the same indices will have different intensities. In this case the symmetry of reflection positions (lattice) is higher than the symmetry of their intensities.

Journal logoBIOLOGICAL
CRYSTALLOGRAPHY
ISSN: 1399-0047
Volume 55| Part 10| October 1999| Pages 1703-1717
doi:10.1107/S0907444999008367
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