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Re-investigation of clino-ferrosilite from Lake Naivasha, Kenya

Published online by Cambridge University Press:  14 March 2018

M. G. Bown
M. G. Bown*
Affiliation:
Department of Mineralogy and Petrology, Cambridge
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Summary

The clino-ferrosilite from the lithophysae in an obsidian from Lake Naivasha, Kenya, originally examined by Bowen (1935), has been shown to be substantially pure FeSiO3, with about 5% MnSiO3 in solid solution. It has the same space-group, P21/c, as clino-enstatite and pigeonite. The unit-cell dimensions are a = 9.718 Å, b = 9·088 Å, c = 5·239 Å, β = 108° 27′. These do not conform to the scheme proposed by Brown (1960): reasons are given why this was not unexpected.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 34 , Issue 268 , 1965 , pp. 66 - 70
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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References

Agrell, (S.O.) and Long (J. V. P.), 1959. Proc. Second Symposiunl on X-ray Analysis, Stockholm, p. 391.Google Scholar
Bowen, (N.L.), 1933. J. Wash. Acad. Sci., vol. 23, p. 83.Google Scholar
Bowen, (N.L.), 1935. Amer. Journ. Sci., vol. 30, p. 481.Google Scholar
Bowen, (N.L.), and Posnjak, (E.), 1935. Ibid., vol. 29, p. 151.Google Scholar
Brown, (M.G.) and Gay, (P.), 1957. Acta Cryst., vol. 10, p. 440.Google Scholar
Brown, (M.G.) 1959. Amer. Min., vol. 44, p. 592.Google Scholar
Brown, (G.M.), 1960. Ibid., vol. 45, p. 15.Google Scholar
Hori, (F.), 1956. Mineralogical Journal, vol. 1, p. 359.Google Scholar
Kuno, (H.) and Hess, (H.H.), 1953. Amer. Journ. Sci., vol. 25[, 1>. 741..+741.>Google Scholar
Morimoto, (N.), 1956. Proe. Japan Acad., vol. 32, p. 750.Google Scholar
Morimoto, (N.), Applbman, (D.E.), and Evans, (H.T.), 1960. Zeits. Krist., vol. 114, p. 120.CrossRefGoogle Scholar
Reed, (S. J. B.), 1964. Ph.D. Thesis, University of Cambridge.Google Scholar
Richardson, (H.M.), Ball, (F.), and Rigby, (G.R.), 1952. Acres du l IF Congre's Céramique International, Paris, p. 173.Google Scholar