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Crystallographical Notes

Published online by Cambridge University Press:  15 September 2014

Hugh Marshall
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Extract

I. Axes of Compound Symmetry of the Second Order.

In recent years, since the more or less general adoption of the systematic classification of crystals under the thirty-two possible types of symmetry, it has become usual to dispense with the ‘centre of symmetry’ as one of the elements of crystal symmetry, and to adopt in its place the ‘axis of compound symmetry of the second order.’

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 25 , Issue 1 , 1906 , pp. 383 - 388
Copyright
Copyright © Royal Society of Edinburgh 1906

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References

note * page 384 This does not apply to compound axes of higher order, because an axis cf compound symmetry of order n is necessarily an axis of ordinary symmetry of order n/2.