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Figure 4
(a) View along c showing the [010]/5, modulation in HEKZOO (C6H12N2·2I2; Cm, Z′ = 2.5; Peuronen et al., 2012BB29). One of the three independent DABCO cages and two of the six I2 molecules lie on mirror planes. (b) Two views showing the modulation along [101] in OMOBUP (Shang et al., 2016BB35), a hydrated 2:1 salt in P21/c with Z′ = 5. The pseudotranslation relates the ten independent cations. The larger anions also have a [101]/10 pseudotranslation but it includes inversion centers and so relates two sets of the five anions. The equivalence of inversion and pseudotranslation is possible for the anions because they are nearly centrosymmetric.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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