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Figure 2
View down [001] of a slice (0.35 ≤ z ≤ 0.65) of the structure of (I). Displacement ellipsoids are displayed at the 50% probability level. [Symmetry codes: (ii) −x, 1 − y, 1 − z; (iii) 1 − x, 1 − y, 1 − z.] Note that K2 lies on a fourfold axis and Na2 has [\overline{4}] site symmetry.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 73| Part 2| February 2017| Pages 188-191
https://doi.org/10.1107/S2056989017000494
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