Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-03T01:45:50.574Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Get access Rights & Permissions [Opens in a new window]

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

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bowen, (N. L.), 1913. The melting phenomena of the plagioclase feldspars. Amer. Journ. Sci., ser. 5, vol. 35, pp. 577-599.Google Scholar
Brindley, (G. W.) and Robinson, (K.), 1946. The structure of kaolinite. Min. Mag., vol. 27, pp. 242-253.Google Scholar
Chayes, (F.), 1952. Relations between composition and indices of refraction in natural plagioclase. Amer. Journ. Sci., Bowen vol., pp. 85-105. [M.A. 12-134.]Google Scholar
Claisse, (F.), 1950. A roentgenographic method for determining plagioclases. Amer. Min., vol. 35, pp. 412-420. [M.A. 11-428.]Google Scholar
Cole, (W. F.), Sörum, (H.), and Taylor, (W. H.), 1951. The structures of the plagioclase felspars. I. Acta Cryst., vol. 4, pp. 20-29. [M.A. 11-427.]Google Scholar
Donnay, (G.) and Donnay, (J. D. H.), 1952. The symmetry change in the high temperature alkali-feldspar series. Amer. Journ Sci., Bowen vol., pp. 115-132. [M.A. 12-96.]Google Scholar
Emmons, (R. C.), 1953. Selected petrogenie relationships of plagioclase. Mem. Geol. Soc. Amer., no. 52. [M.A. 12-136.]Google Scholar
Gay, (P.), 1953. The structures of the plagioclase felspars: III. An X-ray study of anorthites and bytownites. Min. Mag., vol. 30, pp. 169-177.Google Scholar
Kracek, (F. C.), and Neuvonen, (K. J.), 1952. Thermochemistry of plagioclase and alkali feldspars. Amer. Journ. Sci., Bowen vol., pp. 293-318. [M.A. 12-134.]Google Scholar
Reynolds, (D. L.), 1952. The difference in optics between volcanic and plutonic plagioclases, and its bearing on the granite problem. Geol. Mag., vol. 89, pp. 233-250. [M.A. 12-137.]Google Scholar
Tuttle, (O. F.) and Bowen, (N. L.), 1950. High-temperature albite and contiguous feldspars. Journ. Geol., vol. 58, pp. 572-583. [M.A. 11-327.]Google Scholar