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<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.1961.032.254.04</article-id>
<title-group>
<article-title>Electron-Optical and Electron-Diffraction Study of a Disordered Structural State in the Transformation Goethitehematite</article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname>McConnell</surname>
<given-names>J. D. C.</given-names>
</name><degrees>M.Sc., M.A., Ph.D.</degrees></contrib>
<contrib contrib-type="author">
<name>
<surname>Lima-de-Faria</surname>
<given-names>J.</given-names>
</name>
<xref ref-type="author-notes" rid="FN1">1</xref></contrib>
<aff>Dept. of Mineralogy and Petrology, Downing Place, Cambridge.</aff></contrib-group>
<author-notes>
<fn fn-type="other" id="FN1"><label>1</label><p>Junta de Investiga&#x00E7;&#x00F6;es do Ultramar, Lisbon.</p></fn></author-notes>
<pub-date pub-type="ppub">
<month>9</month>
<year>1961</year>
</pub-date>
<volume>32</volume>
<issue>254</issue>
<fpage>898</fpage>
<lpage>901</lpage>
<copyright-statement>Copyright &#x00A9; 1961, The Mineralogical Society</copyright-statement>
<copyright-year>1961</copyright-year>
<abstract>
<title>Summary</title>
<p>Previous X-ray observations by J. Lima-de-Faria and P. Gay on the transformation goethite-hematite indicate that in the process of state change at low temperatures, maxima of scattered X-ray intensity occur as satellites to strong and diffuse Bragg maxima due to hematite. These maxima define a repeat distance of about 32 &#x00C5;. Corresponding satellite maxima have been observed using electron diffraction technique and satellite maxima flanking the direct beam (000) have been used to obtain a direct electron optical image of the disordered state at high magnification. Such photographs show a mainly regular fringe system with spacing of approximately 30 &#x00C5;. Dislocation patterns were also observed.</p></abstract>
</article-meta>
</front>
</article>
