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The identification and determination of plagioclase felspars by the X-ray powder method

Published online by Cambridge University Press:  14 March 2018

J. Goodyear  and
W. J. Duffin
J. Goodyear
Affiliation:
Physics Department, University College, Hull
W. J. Duffin
Affiliation:
Physics Department, University College, Hull
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Extract

There appear to be few published data correlating X-ray powder patterns of chemically analysed plagioclase felspars with composition. Tuttle and Bowen (1950) have examined the powder patterns of low-temperature and high-temperature modifications and find that pure albite from Amelia, Virginia, when heated for ten days at 1050° C., gives a powder pattern identical with that of synthetic albite. They have not given, however, complete data over the whole range from An0Ab100 to An100Ab0. Claisse (1950) selected six reflections from the powder patterns of eight plagioclases of composition extending over the complete range, and plotted line separations against composition determined optically, but did not distinguish between high- or low-temperature forms.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 224 , March 1954 , pp. 306 - 326
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1954

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References

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