<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>P. Toulmin III</dc:contributor>
  <dc:creator>P. B. Barton Jr.</dc:creator>
  <dc:date>1964</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The fugacity of&amp;nbsp;&lt;/span&gt;sulfur&lt;span&gt;&amp;nbsp;along the curve representing the univariant equilibrium assemblage,&amp;nbsp;&lt;/span&gt;chalcopyrite&lt;span&gt;&amp;nbsp;+&amp;nbsp;&lt;/span&gt;bornite&lt;span&gt;&amp;nbsp;+&amp;nbsp;&lt;/span&gt;pyrite&lt;span&gt;&amp;nbsp;+ vapor, has been determined by the electrum tarnish method (1). The conditions of the equilibrium may be expressed by the equation (TP) - /°s&amp;nbsp;&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;(T, 1 atm) = -50,730 + 56.95T (cal.) (&lt;/span&gt;350&lt;span&gt;&amp;nbsp;-&amp;nbsp;&lt;/span&gt;500°&lt;span&gt;&amp;nbsp;&lt;/span&gt;C&lt;span&gt;) (T in °K). With gentle curvature, the line may be extended upward to the invariant point at 568°&amp;nbsp;&lt;/span&gt;C&lt;span&gt;, which represents the assemblage&amp;nbsp;&lt;/span&gt;chalcopyrite&lt;span&gt;&amp;nbsp;+&amp;nbsp;&lt;/span&gt;bornite&lt;span&gt;&amp;nbsp;-j-&amp;nbsp;&lt;/span&gt;pyrite&lt;span&gt;&amp;nbsp;+ liquid + vapor (8).&amp;nbsp;&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.2113/gsecongeo.59.5.747</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Society of Economic Geologists</dc:publisher>
  <dc:title>Experimental determination of the reaction chalcopyrite + sulfur = pyrite + bornite from 350 to 500° C</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>