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A new polytype of taaffeite–a rare beryllium mineral from the granulites of central Australia

Published online by Cambridge University Press:  14 March 2018

D. R. Hudson ,
Allan F. Wilson  and
Ian M. Threadgold
D. R. Hudson
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St. Lucia, Queensland, Australia
Allan F. Wilson
Affiliation:
Department of Geology and Mineralogy, University of Queensland, St. Lucia, Queensland, Australia
Ian M. Threadgold
Affiliation:
Department of Geology and Geophysics, University of Sydney, Sydney, New South Wales, Australia
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Summary

Chemical and single crystal X-ray studies have shown the existence of a 9-layer polytype of taaffeite. The parameters of the hexagonal unit-cell are a 5·675 Å, c 41·096 Å (arh 14·085 Å, α 23·24°). The oxide composition of the mineral is Al2O3 71·44, MgO 15·76, FeO 6·78, BeO 5·50%. It is pale olive green, with refractive indices ω = 1·739, ε = 1·735, and a specific gravity of 3·68.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 36 , Issue 279 , September 1967 , pp. 305 - 310
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1967

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References

Anderson, (B. W.), Payne, (C. J.), and Clarngbull, (G. F.), 1951. Min. Mag., vol. 29, p. 765.Google Scholar
Geller, (Pv. F.), Yavorsky, (P. J.), Steierman, (B. L.), and Creamer, (A. S.), 1946. Journ. Res. Nat. Bur. Stand., vol. 36, p. 277.Google Scholar
Hudson, (D. R.) and Wilson, (A. F.), 1966. Geol. Mag., vol. 103, p. 293.Google Scholar
McKie, (D.), 1963. Min. Mag., vol. 33, p. 563.Google Scholar
Peng, (C. C.) and Wang, (K. J.), 1963. Scientia Sinica, vol. 12, p. 276. [M. A. 16-609].Google Scholar
Pollock, (J. B.), 1956. Analyst, vol. 81, p. 45.CrossRefGoogle Scholar
Webster, (R.), 1962. Gems: their sources, descriptions, and identification. Butter-worths, London.Google Scholar
Weisz, (O.), Cochran, (W.), and Cole, (W. F.), 1948. Acta Cryst., vol. 1, p. 83.Google Scholar
Wilson, (A. F.), 1959. Geol. Rund., vol. 47, p. 491.Google Scholar
Wilson, (A. F.), 1960. Trans. Roy. Soe. South Australia, vol. 83, p. 37.Google Scholar