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

14 March 1954

journal article
Published by Mineralogical Society in Mineralogical Magazine and Journal of the Mineralogical Society

Vol. 30 (224) , 306-326
https://doi.org/10.1180/minmag.1954.030.224.03

Abstract

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.

Keywords

This publication has 5 references indexed in Scilit:

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