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On some twins of calcite; and on a simple method of drawing crystals of calcite and other rhombohedral crystals, and of deducing the relations of their symbols

Published online by Cambridge University Press:  14 March 2018

W. J. Lewis
W. J. Lewis*
Affiliation:
University of Cambridge
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Extract

Having had occasion recently to draw the twins of calcite, I noticed the advantage of the twin-axes being all placed in the plane of the paper. The representation of the rhombohedron which results from this condition is so unsatisfactory that, obvious as the idea must have been to all crystal draughtsmen, few, if any, seem to have tested the utility of the projection. I desire to point out a few of its advantages.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 15 , Issue 68 , April 1908 , pp. 62 - 77
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1908

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References

Page 73 note 1 J. R. McD. Irby, ‘On the crystallography of calcite.’ Inaug.-Diss., Bonn, 1878.

Page 74 note 1 Bowman, H. L., Min. Mag., 1903, vol. xiii, p. 329.CrossRefGoogle Scholar