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Figure 2
Bipolar macro states of solid matter. The object is built of two domains showing opposite polarities, yielding zero in total. The symbol of the continuous group for the entire object is ∞/∞m (equivalent symbol ∞/mm from International Tables for Crystallography; Authier, 2006BB58).

IUCrJ
Volume 4| Part 4| July 2017| Pages 360-368
ISSN: 2052-2525
https://doi.org/10.1107/S205225251700700X