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Figure 8
(a) Atomic basin of O9 (red shape) surrounded by basins belongs to sulfur (yellow), magnesium (cyan), oxygen (green) and potassium atoms (pink); (b) SO4 group (green – oxygen, yellow – sulfur).

IUCrJ
Volume 9| Part 1| January 2022| Pages 146-162
ISSN: 2052-2525
https://doi.org/10.1107/S2052252521012628