The Normal-Pattern Finder: An Aid to Stereographic Projection

G. Boom
Kristallografisch Instituut, Groningen University, The Netherlands

Summary: The normal-pattern finder is a mechanical aid for use in finding the various possible configurations of a construction in the Barker system for anorthie crystals. Its purpose is to avoid the drawing of zones in pencil on the stereographic projection, which zones make it more difficult to recognize other differently constructed normal-patterns.

Mineralogical Magazine; March 1957 v. 31; no. 236; p. 358-360; DOI: 10.1180/minmag.1957.031.236.02
© 1957, The Mineralogical Society
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