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Figure 4
Helical chains parallel to [001] (top and bottom, left) are present in the crystal structure of the tetra­gonal polymorph. Displacement ellipsoids (except for hydrogen atoms) are drawn at the 50% probability level.

Journal logoCRYSTALLOGRAPHIC
COMMUNICATIONS
ISSN: 2056-9890
Volume 70| Part 12| November 2014| Pages 555-558
doi:10.1107/S160053681402529X
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