<?xml version="1.0"?>
<!DOCTYPE article SYSTEM "journalpublishing.dtd">
<article article-type="research-article">
<front>
<journal-meta>
<journal-id journal-id-type="archive">gsminmag</journal-id>
<journal-title>Mineralogical Magazine</journal-title>
<abbrev-journal-title abbrev-type="full">Mineralogical Magazine</abbrev-journal-title>
<issn pub-type="ppub">0026-461X</issn>
<publisher>
<publisher-name>Mineralogical Society</publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.1180/minmag.1963.033.263.07</article-id>
<title-group>
<article-title>The Stereographic Projection: A Procedural Revision in Crystallography</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>Oppenheim</surname>
<given-names>M. J.</given-names>
</name> <degrees>B.Sc., Ph.D.</degrees>
<aff>Department of Geology, The Hebrew University of Jerusalem, Israel</aff></contrib></contrib-group>
<pub-date pub-type="ppub">
<month>12</month>
<year>1963</year>
</pub-date>
<volume>33</volume>
<issue>263</issue>
<fpage>697</fpage>
<lpage>700</lpage>
<copyright-statement>Copyright &#x00A9; 1963, The Mineralogical Society</copyright-statement>
<copyright-year>1963</copyright-year>
<abstract>
<title>Summary</title>
<p>Objections are raised to the custom of reversing the pole of projection when dealing with lower crystal faces, for some points so projected no longer retain their natural interangular relations. Instead, lower face normals may be replaced by their antipodal points; these antipodal points are then projected in the usual manner, with suitable symbols. The resultant stereographic projection not only portrays all crystal faces within the primitive circle but is also strictly angle-true.</p></abstract>
</article-meta>
</front>
</article>
