In:
Journal of Applied Crystallography, International Union of Crystallography (IUCr), Vol. 53, No. 6 ( 2020-12-01), p. 1524-1530
Abstract:
Acetylene and ammonia are known to form a stable orthorhombic co-crystal under the surface conditions of Saturn's moon Titan (1.5 bar = 150 kPa, 94 K). Such a material represents a potential new class of organic minerals that could play an important role in Titan's geology. In this work, the thermal expansion of this co-crystalline system has been derived from in situ powder X-ray diffraction data obtained between 85 and 120 K. The results indicate significant anisotropy, with the majority of the expansion occurring along the c axis (∼2% over the temperature range of interest). Rietveld refinements reveal little change to the structure compared with that previously reported by Boese, Bläser & Jansen [ J. Am. Chem. Soc. (2009), 131 , 2104–2106]. The expansion is consistent with the alignment of C—H...N interactions along the chains in the a and b axes, and weak intermolecular bonding in the structural layers along the c axis.
Type of Medium:
Online Resource
ISSN:
1600-5767
DOI:
10.1107/S1600576720014028
Language:
Unknown
Publisher:
International Union of Crystallography (IUCr)
Publication Date:
2020
detail.hit.zdb_id:
2020879-0
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