Farman, H. and Coveney, F. and Dore, J.C. and Bellissent-Funel, M.C. (1996) Structural studies of cyclohexane C6D12 by neutron diffraction .3. Temperature variation measurements for the liquid and plastic crystal phases. Molecular Physics, 87 (5). pp. 1217-1233. ISSN 0026-8976.
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Neutron diffraction measurements on C6D12 over a wide temperature range, covering liquid crystal, plastic crystal and brittle crystal phases, are presented. The data extend work conducted previously over a restricted temperature range and show that the structural features are dependent on the thermal history of the sample. The results demonstrate the relative contributions from lattice symmetry (ordered) and diffuse scattering (disordered) at varying temperatures. The spatial distribution function undergoes a complex change in which orientational correlations between adjacent molecules appear to be coupled to translational displacements of the molecular centres. Previous assumptions that cyclohexane is an 'almost-unhindered' rotator are found to be erroneous and the spatial correlations exhibit a complex relationship which is sensitive to temperature variation. Further methods for the analysis of the order-disorder features are considered.
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences|
|Depositing User:||R.F. Xu|
|Date Deposited:||08 Jun 2009 16:13|
|Last Modified:||08 May 2012 12:55|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/19172 (The current URI for this page, for reference purposes)|
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