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The crystal structure of sinhalite1

Published online by Cambridge University Press:  14 March 2018

J. H. Fang  and
R. E. Newnham
J. H. Fang
Affiliation:
Laboratory for Insulation Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, U.S.A.
R. E. Newnham
Affiliation:
Laboratory for Insulation Research, Massachusetts Institute of Technology, Cambridge, Massachusetts, U.S.A.
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Summary

The Ceylonese gemstone sinhalite, AlMgBO4, is isomorphous with olivine and chrysoberyl. Aluminium and magnesium are oetahedrally coordinated and boron occupies slightly distorted tetrahedra. Because of size differences, the smaller Al ion can be assigned to the inversion symmetry sites, with Mg in mirror plane positions. Least-squares refinement based on single crystal X-ray data gave an accurate set of atomic coordinates with mean interatomic distances: Al-O 1·90, Mg-O 2·10, B-O 1·49 Å.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 269 , March 1965 , pp. 196 - 199
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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References

Christ, (C. L.), Clark, (J. R.), and Evans (H. T., Jr.), 1958. Acta. Cryst., vol. 11, p. 761.Google Scholar
Clarinobull, (G. F.) and Hey, (M. H.). 1952. Min. Mag., vol. 29, p. 841.Google Scholar
Farrell, (E. F.), Fano, (J. H.). and Newnham (R E.), 1963. Amer. Mis., vol. 48, p. 804.Google Scholar
Geller, (S.) and Durand, (J. L.), 1960. Acta Cryst., vol. 13, p. 325.Google Scholar
Gibbs, (G. V.), Knowles, (C. R.), Perrotta, (A. J.), and Smith, (J. V.), 1963. Acta Cryst., vol. 16, p. A13.Google Scholar
Hanke, (K.), 1963. Neues Jahrb. Min., Monatsh., vol. 8, p. 192.Google Scholar
Hanke, (K.) and Zhmann, (J.), 1963. Naturwiss., vol. 50, p. 91.Google Scholar
Newnham, (R. E.), Santoro, (R.), Pearson, (J.), and Jansen, (C.), 1964. Amer. Min., vol. 49, p. 427.Google Scholar
Payne, (C. J.), 1958. Min. Mag., vol. 31, p. 978.Google Scholar
Schallhr, (W. T.) and Hildhbrand, (F. A.), 1955. Amer. Min., vol. 40, p. 453.Google Scholar
Zachariasen, (W. H.), 1963. Acta Cryst., vol. 16, p. 385.Google Scholar