How molecular solids prepare for phase transitions: The phase transition in oxalyl chloride

DOI

Oxalyl chloride (mpt. 260 K), forms an ordered phase at low temperature, but a disordered phase between 250 K and the melting point. In previous beamtime we aimed to carry out PDF measurements to characterise the development of local structure in oxalyl choride as it was warmed through the phase transition. Excellent data were collected on phase-II, but experimental difficulties meant that we were unable to collect data on the disordered phase-I. The results we have so far indicate that the instability of phase-II might be ascribable to short Cl¿Cl contacts which occur as the result of thermal motion, but without data on phase-I we can not tell if these short contacts have been relieved after the transition. We now request beamtime to complete our study by collecting total scattering data on phase-I.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24086384
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24086384
Provenance
Creator Professor Andrew Goodwin; Professor Martin Dove; Professor Simon Parsons; Mr Nick Funnell; Professor David Keen; Dr Matthew Tucker; Mr Hong Fang
Publisher ISIS Neutron and Muon Source
Publication Year 2014
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Photon- and Neutron Geosciences
Temporal Coverage Begin 2011-07-13T07:32:12Z
Temporal Coverage End 2011-07-15T12:56:15Z