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Neutron diffraction at simultaneous high temperatures and pressures, with measurement of temperature by neutron radiography

Published online by Cambridge University Press:  05 July 2018

Y. Le Godec ,
M. T. Dove ,
D. J. Francis ,
S. C. Kohn ,
W. G. Marshall ,
A. R. Pawley ,
G. D. Price ,
S. A. T. Redfern ,
N. Rhodes  and
N. L. Ross
...Show all authors
Y. Le Godec
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
M. T. Dove*
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
D. J. Francis
Affiliation:
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
S. C. Kohn
Affiliation:
Department of Earth Sciences, University of Bristol, Wills Memorial Building, Queen's Road, Bristol BS8 1RJ, UK
W. G. Marshall
Affiliation:
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
A. R. Pawley
Affiliation:
Department of Earth Sciences, University of Manchester, Oxford Road, Manchester M13 9PL, UK
G. D. Price
Affiliation:
Department of Geological Sciences, University College London, Gower Street, London WC1E 6BT, UK
S. A. T. Redfern
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
N. Rhodes
Affiliation:
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
N. L. Ross
Affiliation:
Department of Geological Sciences, University College London, Gower Street, London WC1E 6BT, UK
P. F. Schofield
Affiliation:
Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
E. Schooneveld
Affiliation:
ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire OX11 0QX, UK
G. Syfosse
Affiliation:
Physique des Milieux Condensés, Université Pierre et Marie Curie, 75252 Paris, France
M. G. Tucker
Affiliation:
Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK
M. D. Welch
Affiliation:
Department of Mineralogy, Natural History Museum, Cromwell Road, London SW7 5BD, UK
*
*E-mail: [email protected]
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Abstract

The commissioning and operation of apparatus for neutron diffraction at simultaneous high temperatures and pressures is reported. The basic design is based on the Paris-Edinburgh cell using opposed anvils, with internal heating. Temperature is measured using neutron radiography. The apparatus has been shown in both on-line and off-line tests to operate to a pressure of 7 GPa and temperature of 1700°C. The apparatus has been used in a neutron diffraction study of the crystal structure of deuterated brucite, and results for 520°C and 5.15 GPa are presented. The diffraction data that can be obtained from the apparatus are of comparable quality to previous high-pressure studies at ambient temperatures, and are clearly good enough for Rietveld refinement analysis to give structural data of reasonable quality.

Keywords

neutron diffractionhigh temperaturehigh pressureneutron radiographyRietveld refinement
Type
Research Article
Information
Mineralogical Magazine , Volume 65 , Issue 6 , December 2001 , pp. 737 - 748
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2001

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Footnotes

*

Dedicated to the memory of Prof. Jean-Michel Besson (Paris, 1936–2001)

†

Present address: Department of Geological Sciences, Virginia Tech, 4044 Derring Hall, Blacksburg, VA 24061, USA

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