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Figure 17
Geometrically non-equivalent contacts of two layers in polytypes (a) I and (b) II of DSEM (4) projected on the layer plane (100). The TMS groups and the connecting sp1 hybridized C atom are shown. Atoms of the lower layer are gray and blurred, color codes of the top layer as in Fig. 7[link]. H atoms have been omitted for clarity.

IUCrJ
Volume 2| Part 5| September 2015| Pages 584-600
ISSN: 2052-2525
https://doi.org/10.1107/S2052252515011665