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Figure 8
Detail of the chibaite framework at T = 100 K (above) and 293 K (below): the [512]- and [51264]-type cages are linked via five-membered rings. All framework atoms (Si: blue, O: red) and the fully occupied C1 position (yellow) are shown as 50% probability ellipsoids determined from the corresponding Uij values. All partially occupied C2 positions (small yellow spheres) are located in the central region of the [51264] cage. The purple areas mark the six-membered ring units with the Na atoms and Na—O bonds (in purple).

IUCrJ
Volume 5| Part 5| September 2018| Pages 595-607
ISSN: 2052-2525
https://doi.org/10.1107/S2052252518009107