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Figure 3
The coordination of the Ca2+ ions in (I)[link], showing the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level. Dashed lines represent possible intra-layer C—H⋯O inter­actions. [Symmetry codes: (i) −x + 1, y − [1 \over 2], −z + [1 \over 2]; (ii) −x, y − [1 \over 2], −z + [1 \over 2]; (iii) −x + 1, y + [1 \over 2], −z + [1 \over 2]; (iv) x − 1, y, z; (v) x, y − 1, z; (viii) x + 1, y, z; (x) −x + 2, y + [1 \over 2], −z + [1 \over 2].]

Journal logoSTRUCTURAL
CHEMISTRY
ISSN: 2053-2296
Volume 68| Part 1| December 2012| Pages m4-m6
doi:10.1107/S0108270111051559
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