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A simplified method of 2 V determination using 3- and 4-axis stages

Published online by Cambridge University Press:  14 March 2018

Ernest G. Ehlers
Ernest G. Ehlers*
Affiliation:
Department of Mineralogy, The Ohio State University, Columbus, Ohio
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Summary

A method is presented for use with a 3- or 4-axis stage whereby a biaxial mineral, after being oriented into the cardinal position by means of the inner vertical, NS., and EW. axes, can be placed into an orientation suitable for measurement of the 2 V as required by the Berek method. A table of the necessary manipulations is given. The stereographic projection is only used to determine rotational corrections.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 35 , Issue 275 , September 1966 , pp. 958 - 962
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1966

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References

Berek, (M.), 1923. Neues Jahrb., Bcil.-Bd. 4B, p. 34.Google Scholar
Emmons, (R. C.), 1943. The Universal Stage, Geol. Soc. Amer. Memoir 8.Google Scholar
Hartshorne, (N. H.) and Stuart, (A.), 1960. Crystals and the polarizing microscope. Edward Arnold Ltd. London.Google Scholar