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The use of the stereographic protractor for the interpretation of Laue crystal-photographs

Published online by Cambridge University Press:  14 March 2018

A. Hutchinson*
Affiliation:
University of Cambridge

Extract

The spots of a Laue crystal-photograph may be regarded as due to the reflection of X-radiation by the planes of the crystal and the interpretation of these photographs involves the determination of the index of the plane by which any given spot is produced. This 'interpretation can be readily accomplished by two distinct though related methods. We may, in the first place, utilize the stereographic projection and determine the indices of the planes by means of intersecting zone- circles. This method, the earliest in point of time, was explained by W. L. Bragg in 1913. In recent years, however, it has become usual to employ for this purpoee the gnomonic projection which affords a solution in some respects impler and more direct than the stereographic method used by Bragg, and detailed illustrations of its application in this field have been given by R. W. G. Wyckoff, and E. Schiebold.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1926

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References

page 10 note 1 Bragg, W. L., Proc. Boy. Soe. London, ser. A, 1918, vol. 89, p. 248 Google Scholar.

page 10 note 2 Wyckoff, R. W. G., Anier. Journ. Sci., 1920, ser. 4, vol. 50, p. 319. [Min. Abstr., vol. 1, p. 194.]Google Scholar

page 10 note 3 Schiebold, E., Die Nnturwissenschaften, 1922, vol. 10, p. 899.Google Scholar

page 10 note 4 Hutchinson, A., Min. Mag., 1903, vol. 15, pp. 93-112 Google Scholar.