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Figure 1 . View of the environment of Zn atoms (Spek, 2009) with omission of the K atoms. The displacement ellipsoids are shown at the 50% probability level. The hydrogen bonds are indicated by the dashed lines. The arrows depict two-fold axes. Symmetry code: (i) −x + , y + , −z + 1; (ii) −x + 1, y, −z + 1; (iii) −x + , y + , −z + 1. |