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Figure 3
View down [001] of a slice (0.25 ≤ z ≤ 0.35) of the structure of (I). Displacement ellipsoids are displayed at the 50% probability level. [Symmetry codes: (iii) 1 − x, 1 − y, 1 − z; (iv) [{3\over 2}] − y, x, z; (v) [{1\over 2}] − y, x, z; (vi) [{1\over 2}] + y, 1 − x, 1 − z; (vii) [{1\over 2}] + x, [{1\over 2}] + y, 1 − z.] Note that Cl1 and Cl2 lie on fourfold axes and Cl3 lies on a twofold axis. The chloride ions link to the sodium and potassium ions shown in Figs. 1[link] and 2[link] to generate infinite stacks of alternating NaO4Cl2 and KO4Cl2 octa­hedra.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
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