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Figure 11
Directed quotient graphs of the hydrogen-bonding chains schematized in Fig. 10[link]. Each node represents molecules and their equivalents by translation along na, [n\in\bb{Z}]. The orientations of molecules represented by white and gray nodes are related by a 2[010] rotation. Arrows represent hydrogen bonds and are labeled with the connected oxygen atoms. A voltage of 100 or [\overline{1}00] on top of an arrow means that the target node is related to the corresponding node in the 0 < x < 1 unit cell by the translation along a and −a, respectively.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
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