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Determination of the composition of kalsilites by an X-ray method

Published online by Cambridge University Press:  14 March 2018

Th. G. Sahama ,
K. J. Neuvonen  and
Kai Hytönen
Th. G. Sahama
Affiliation:
Institute of Geology, Helsinki, Finland
K. J. Neuvonen
Affiliation:
Geological Survey, Helsinki, Finland
Kai Hytönen
Affiliation:
Institute of Geology, Helsinki, Finland
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Summary

Three new analyses of kalsilite are given, with optical and X-ray data; two (K/(K + Na) = 0·95. 0·98) are from rocks where it is closely associated with nepheline. An analysis of one of the nephelines is also given (K/(K + Na) = 0·31). The cell dimensions vary appreciably with sodium content, and the composition of kalsilite may be determined from the equation:

100 K/(K + Na) = 100−227·27(Δ 6·264),

where Δ is the difference, in degrees, between the diffraction angles 2ϑ for 102 and 101, using Cu-Kα radiation.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 234 , September 1956 , pp. 200 - 208
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1956

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References

Bannister, (F. A.) and Hey, (M. H.), 1942. Min. Mag., Vol. 26, p. 218.Google Scholar
Bannister, (F. A.) and Hey, (M. H.), Sahama, (Th. G.), and Wiik, (H. B.), 1953. Ibid., Vol. 30, p. 46.Google Scholar
Jay, (A. H.) and Andrews, (K. W.), 1947. Ibid., Vol. 28, p. 88.Google Scholar
Rigby, (G. R.) and Richardson, (H. M.), 1947. Ibid., Vol. 28, p. 75.Google Scholar
Sahama, (Th. G.), 1953. Ann. Acad. Scient. Fenn., Ser. A III, No. 36, p. 1 [M.A. 12-372].Google Scholar
Sahama, (Th. G.), 1954. Compt. Rend. Soc. géol. Finlande, No. 27, p. 21.Google Scholar
Smith, (J. V.) and Sahama, (Th. G.), 1954. Min. Mag., Vol. 30, p. 439.Google Scholar
Smith, (J. V.) and Sahama, (Th. G.), 1956. The nepheline-kalsilite system: I. X-ray data for the crystalline phases (in press).Google Scholar