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Figure 4
A model of the packing of the StOSt molecules in the layers of the α2-phase (left-hand side of the figure) and a fragment of the projection of the electron density distribution [presented by a strip model (Worthington, 1969BB15)] of the molecules on the layer normal (right-hand side of the figure). The period of the layers in the shown fragment is 54.3 Å (= 29.7 + 24.6 Å). The largest value of the electron density corresponds to locations of the glycerol residues of the molecules in the layers (marked by the dashed lines). The molecules in bold represent models of packing of StOSt molecules in dimers (labelled by 1 and 2), which are likely to be formed in the liquid state before the formation of the α2-phase.

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