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The variation of the 01 reflection in plagioclases

Published online by Cambridge University Press:  05 July 2018

D. L. Hamilton  and
A. D. Edgar
D. L. Hamilton
Affiliation:
Department of Geology, The University, Manchester, England
A. D. Edgar
Affiliation:
Department of Geology, University of Western Ontario, London, Ontario, Canada
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Summary

The position of the 01 X-ray reflection in albite varies with the degree of Al/Si ordering. This is also true for binary plagioclases but the 01 reflection for high-temperature plagioclases is constant and therefore independent of anorthite content. For plagioclases of ternary composition grown in a hydrous silicate melt, the position of the 01 reflection gives a good estimate of the orthoclase content when a determinative curve is used that was originally drawn from data on high-temperature synthetic binary alkali feldspars.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 285 , March 1969 , pp. 16 - 25
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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References

Carmichael, (I. S. E.), 1964. Natural liquids and the phonolitic minimum. Geol. Journ. 4, 55-60.10.1002/gj.3350040105CrossRefGoogle Scholar
Carmichael, (I. S. E.) and MacKenzie, (W. S.), 1964. The lattice parameters of high-temperature triclinic sodic feldspars. Min. Mag. 33, 949-62.Google Scholar
Grundy, (H. D.), 1966. Crystallographic study of the feldspars. Ph.D. thesis, Manchester University.Google Scholar
Kempe, (D. R. C.), 1966. A note on the 01 spacing of some lime-rich alkali feldspars from Kangerdlugssuaq, East Greenland. Min. Mag. 35, 704-14.Google Scholar
MacKenzie, (W. S.), 1957. The crystalline modifications of NaAlSi3O8 . Amer. Journ. Sci. 255, 48 1-516.10.2475/ajs.255.7.481CrossRefGoogle Scholar
Orville, (P. M.), 1958. Feldspar investigations. Ann. Rep. Dir. Geophys. Lab. Carnegie Inst. Washington, 206.Google Scholar
Orville, (P. M.), 1967. Unit-cell parameters of the microcline-low albite and the sanidine-high albite solid solution series. Amer. Min. 52, 55-86.Google Scholar
Parsons, (I.), 1968. Homogeneity in alkali feldspars. Min. Mag. 36, 801.Google Scholar
Smith, (J. V.), 1956. The powder patterns and lattice parameters of plagioclase feldspars. I. The sodarich plagioclases. Ibid. 31, 47.10.1180/minmag.1956.031.232.05CrossRefGoogle Scholar