<?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>J. W. Stout</dc:contributor>
  <dc:creator>R. A. Robie</dc:creator>
  <dc:date>1963</dc:date>
  <dc:description>&lt;p&gt;The heat capacities of talc, Mg&lt;sub&gt;3&lt;/sub&gt;Si&lt;sub&gt;4&lt;/sub&gt;O&lt;sub&gt;10&lt;/sub&gt;(OH)&lt;sub&gt;2&lt;/sub&gt;, and tremolite, Ca&lt;sub&gt;2&lt;/sub&gt;Mg&lt;sub&gt;6&lt;/sub&gt;Si&lt;sub&gt;8&lt;/sub&gt;O&lt;sub&gt;22&lt;/sub&gt;(OH)&lt;sub&gt;2&lt;/sub&gt;, have been measured between 12 and 305°K. Smoothed values of heat capacity, entropy, enthalpy, and free energy are tabulated. At 298.15° K. the values of the thermodynamic functions are: talc, C&lt;sub&gt;p&lt;/sub&gt;°= 76.89 &lt;span&gt;±&lt;/span&gt;&amp;nbsp;0.23 cal. deg.&lt;sup&gt;-1&lt;/sup&gt; mole&lt;sup&gt;-1&lt;/sup&gt;, S° = 62.33&lt;span class="nowrap"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;±&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;0.19 cal. deg.&lt;sup&gt;-1&lt;/sup&gt; mole&lt;sup&gt;-1&lt;/sup&gt;, H° - H&lt;sub&gt;0&lt;/sub&gt;° = 11,206&amp;nbsp;&lt;span&gt;±&lt;/span&gt;&amp;nbsp;34 cal. mole&lt;sup&gt;-1&lt;/sup&gt;; tremolite, Cp° = 156.7&lt;span class="nowrap"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;±&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;0.6 cal. deg.&lt;sup&gt;-1&lt;/sup&gt; mole&lt;sup&gt;-1&lt;/sup&gt;, S° = 131.2&lt;span class="nowrap"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;±&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;0.5 cal. deg.&lt;sup&gt;-1&lt;/sup&gt; mole&lt;sup&gt;-1&lt;/sup&gt;, H° - H&lt;sub&gt;0&lt;/sub&gt;° = 23,335&lt;span class="nowrap"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;±&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;90 cal. mole&lt;sup&gt;-1&lt;/sup&gt;. From the equilibrium data of Bowen and Tuttle and the entropy of talc, the heat of formation of talc from MgO, SiO&lt;sub&gt;2&lt;/sub&gt;, and H&lt;sub&gt;2&lt;/sub&gt;O (liq.) is calculated to be &lt;span&gt;Δ&lt;/span&gt;H°f&lt;sub&gt;298&lt;/sub&gt; = -43.6&lt;span class="nowrap"&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;&lt;/span&gt;&lt;span&gt;±&lt;/span&gt;&lt;span&gt;&amp;nbsp;&lt;/span&gt;1 kcal.&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1021/j100805a003</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>ACS Publications</dc:publisher>
  <dc:title>Heat capacity from 12 to 305°K and entropy of talc and tremolite</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>