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Time-of-flight neutron diffraction studies of clay-fluid interactions under basin conditions

Published online by Cambridge University Press:  09 July 2018

N. T. Skipper,
G. D. Williams,
A. V. C. de Siqueira,
C. Lobban and
A. K. Soper
N. T. Skipper*
Affiliation:
Department of Physics and Astronomy, University College, Gower Street, London WC1E 6BT
G. D. Williams
Affiliation:
Department of Physics and Astronomy, University College, Gower Street, London WC1E 6BT
A. V. C. de Siqueira
Affiliation:
Department of Physics and Astronomy, University College, Gower Street, London WC1E 6BT
C. Lobban
Affiliation:
Department of Physics and Astronomy, University College, Gower Street, London WC1E 6BT
A. K. Soper
Affiliation:
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, UK
*
*E-mail: n.skipper@ucl.ac.uk
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Abstract

Neutron diffraction experiments can provide an extremely high-resolution structural picture of clay-fluid systems. Here we describe the application of time-of-flight neutron scattering to hydrated clays, including discussion of issues such as isotopic labelling, sample containment, and data analysis. Recent studies of hydrated vermiculites under ambient conditions are used as an example. We then describe a new high-pressure/high-temperature sample environment that is being used to study clay-fluid interactions, in situ under hydrostatic sedimentary basin conditions. This environment enables us to approximate conditions encountered during burial, at depths of up to 10 km.

Keywords

time-of-flightneutron diffractionclay-fluid interactionssedimentary basin conditions

Information

Type
Research Article
Information
Clay Minerals , Volume 35 , Issue 1 , March 2000, pp. 283 - 290
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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