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Figure 7
The crystal structure of kaliophilite as seen down c, with the three corollas indicated. (a), (b), (c) The three symmetry-independent corollas, A, B and C, occurring in kaliophilite are formed by a trigonal ring (1-3-5) at the center and six oval rings around it. The topologies of the oval rings are (1-2-4) and (1-2-3) in corollas A and B, whereas they are (1-3-5) in corolla C. Corollas A and B are related by the translation vector t = (1/3)a − (1/3)b + (1/2)c. (d) A drawing of the crystal structure of kaliophilite as seen down c, where the locations of the corollas, A, B and C, are emphasized by red circles.

IUCrJ
Volume 7| Part 6| November 2020| Pages 1070-1083
ISSN: 2052-2525
https://doi.org/10.1107/S2052252520012270