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Figure 2
A selected part of the (h0lm) reciprocal plane of urea–octane at 90 K. The weak diffuse layer marked with the horizontal arrow can be indexed with l = 0; m = −10. However, it could also correspond to a d-band arising from the internal periodicity of the alkane chains. The circled spot belongs to the low-temperature orthorhombic reciprocal lattice, whose orthohexagonal axes a and b are doubled with respect to those of the room-temperature structure.

Journal logoSTRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS
ISSN: 2052-5206
Volume 57| Part 3| May 2001| Pages 378-385
doi:10.1107/S0108768100020218
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