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<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>I-Ming Chou</dc:contributor>
  <dc:contributor>W. Hu</dc:contributor>
  <dc:contributor>Robert Burruss</dc:contributor>
  <dc:contributor>Q. Sun</dc:contributor>
  <dc:contributor>Y. Song</dc:contributor>
  <dc:creator>X. Wang</dc:creator>
  <dc:date>2011</dc:date>
  <dc:description>&lt;p id="sp005"&gt;Raman spectroscopy is a powerful method for the determination of CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;densities in fluid inclusions, especially for those with small size and/or low fluid density. The relationship between CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;Fermi diad split (&lt;i&gt;Δ&lt;/i&gt;, cm&lt;sup&gt;−1&lt;/sup&gt;) and CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;density (&lt;i&gt;ρ&lt;/i&gt;, g/cm&lt;sup&gt;3&lt;/sup&gt;) has been documented by several previous studies. However, significant discrepancies exist among these studies mainly because of inconsistent calibration procedures and lack of measurements for CO&lt;sub&gt;2&lt;/sub&gt;fluids having densities between 0.21 and 0.75&amp;nbsp;g/cm&lt;sup&gt;3&lt;/sup&gt;, where liquid and vapor phases coexist near room temperature.&lt;/p&gt;&lt;p id="sp010"&gt;In this study, a high-pressure optical cell and fused silica capillary capsules were used to prepare pure CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;samples with densities between 0.0472 and 1.0060&amp;nbsp;g/cm&lt;sup&gt;3&lt;/sup&gt;. The measured CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;Fermi diad splits were calibrated with two well established Raman bands of benzonitrile at 1192.6 and 1598.9&amp;nbsp;cm&lt;sup&gt;−1&lt;/sup&gt;. The relationship between the CO&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;Fermi diad split and density can be represented by:&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;ρ&lt;/i&gt;&amp;nbsp;=&amp;nbsp;47513.64243&amp;nbsp;−&amp;nbsp;1374.824414&amp;nbsp;×&amp;nbsp;&lt;i&gt;Δ&lt;/i&gt;&amp;nbsp;+&amp;nbsp;13.25586152&amp;nbsp;×&amp;nbsp;&lt;i&gt;Δ&lt;/i&gt;&lt;sup&gt;2&lt;/sup&gt;&amp;nbsp;−&amp;nbsp;0.04258891551&amp;nbsp;×&amp;nbsp;&lt;i&gt;Δ&lt;/i&gt;&lt;sup&gt;3&lt;/sup&gt;(&lt;i&gt;r&lt;/i&gt;&lt;sup&gt;2&lt;/sup&gt;&amp;nbsp;=&amp;nbsp;0.99835,&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;i&gt;σ&lt;/i&gt;&amp;nbsp;=&amp;nbsp;0.0253&amp;nbsp;g/cm&lt;sup&gt;3&lt;/sup&gt;), and this relationship was tested by synthetic fluid inclusions and natural CO&lt;sub&gt;2&lt;/sub&gt;-rich fluid inclusions. The effects of temperature and the presence of H&lt;sub&gt;2&lt;/sub&gt;O and CH&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;on this relationship were also examined.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/j.gca.2011.04.028</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Elsevier</dc:publisher>
  <dc:title>Raman spectroscopic measurements of CO2 density: Experimental calibration with high-pressure optical cell (HPOC) and fused silica capillary capsule (FSCC) with application to fluid inclusion observations</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>