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The mineralogy of the potassium–barium feldspar series

I. The determination of the optical properties of natural members

Published online by Cambridge University Press:  14 March 2018

N. N. Roy
N. N. Roy*
Affiliation:
Department of Mineralogy and Petrology, Cambridge
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Summary

Variation diagrams for the optic properties and densities of natural specimens within the series have been determined. They focus attention on two composition regions at about 45 % Cn and 65 % Cn. The significance of the first of these is uncertain, but it is suggested that the discontinuity at 65 % Cn is related to structural changes that take place at this composition.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 271 , September 1965 , pp. 508 - 518
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1965

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References

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