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Figure 5
Hydrogen bonding in the structure of kaatialaite. OH (hydroxyl), water (H2O) (Wa) group, regular (thick) arrow = strong cation–oxygen bond, dashed arrow = hydrogen bond, and dotted arrow = alternative [depending on the configuration marked either by (a) or (b)] hydrogen bond.

IUCrJ
Volume 8| Part 1| January 2021| Pages 116-123
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520015626