Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-28T03:07:01.842Z Has data issue: false hasContentIssue false
  • English
  • Français

An extended X-ray absorption fine structure (XAFS) study of the calcium site in a model basaltic glass, Ca3Mg4Al2Si7O24

Published online by Cambridge University Press:  05 July 2018

A. Hardwick ,
E. J. W. Whittaker  and
G. P. Diakun
A. Hardwick
Affiliation:
Department of Earth Sciences, University of Oxford, Parks Road, Oxford OX1 3PR
E. J. W. Whittaker
Affiliation:
Department of Earth Sciences, University of Oxford, Parks Road, Oxford OX1 3PR
G. P. Diakun
Affiliation:
SERC Daresbury Laboratory, Daresbury, Warrington WA4 4AD
Get access Rights & Permissions [Opens in a new window]

Abstract

Short-range order in the oxygen co-ordination shell of the Ca ion in a glass of composition Ca3Mg4Al2Si7O24 is investigated by analysis of the extended X-ray absorption fine structure. The estimate of disorder in the short-range oxygen co-ordination is no greater than that for crystalline samples of diopside and bytownite. An estimate of the oxygen environment of calcium in the particular glass is included.

Keywords

EXAFSbasaltic glassshort-range orderdiopsidebytownite
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 350 , March 1985 , pp. 25 - 29
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

*

Present address: BP Research Centre, Chertsey Road, Sunbury-on-Thames, TWI6 7LN.

References

Clark, J. R., Appleman, D. E., and Papike, J. J. (1969) Mineral. Soc. Am. Spec. Pap. 2, 31–50.Google Scholar
Fleet, S. G., Chandrasekhar, S., and Megaw, H. D. (1966) Acta Crystalloor. 21, 782–801.Google Scholar
Götz, J., and Masson, C. R. (1970) J. Chem. Soc. (A) 2683-6.Google Scholar
Greaves, G. N. (1983) In EXAFS and Near Edoe Structure (Bianconi, A., Incoccia, L., and Stipeich, S., eds.). Springer-Verlag: Berlin, Heidelberg.Google Scholar
Greaves, G. N. and Raoux, D. (1982) In The Structure of Non- Crystalline Materials (Gaskell, P. H., Parker, J. M., and Davis, E. A., eds.), 55-80. Taylor and Francis: London, New York.Google Scholar
Greaves, G. N., Fontaine, A., Lagarde, P., Raoux, D., and Gurman, S. J. (1981) Nature, 293, 611-6.Google Scholar
Hamilton, D. L., and Henderson, C. M. B. (1968) Mineral. Mag. 36, 832-8.Google Scholar
Lee, P. A., and Pendry, J. B. (1975) Phys. Review. 11B, 2795-811.Google Scholar
McMillan, P., Piriou, B., and Navrotsky, A. (1982) Geochim. Cosmochim. Acta, 46, 2021-37.Google Scholar
Shepperd, C. M. (1980) X-ray diffraction studies of silicate glasses. D.Phil. thesis, Oxford.Google Scholar
Taylor, M., and Brown, G. E. (1979a) Geochim. Cosmochim. Acta, 43, 61–76.Google Scholar
Taylor, M., and Brown, G. E. (1979b) Ibid. 43, 1467-73.Google Scholar
Taylor, M. and Fenn, P. M. (1980) Ibid. 44, 10918.Google Scholar