<?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.J. Rowe</dc:contributor>
  <dc:contributor>R.O. Fournier</dc:contributor>
  <dc:creator>G.W. Morey</dc:creator>
  <dc:date>1964</dc:date>
  <dc:description>&lt;p&gt;&lt;span&gt;The join between the compositions K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Mg&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;&amp;nbsp;and K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Ca&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;&amp;nbsp;was studied by means of high-temperature equilibrium quenching techniques and by means of a heating stage mounted on an X-ray diffractometer. Complete solid solution exists in the system, but at 25°C members of the solid solution series are isometric only in the composition range 0–73·5 wt. per cent K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Ca&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;. At compositions richer in K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Ca&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;&amp;nbsp;than 73·5 wt. per cent, members of the series are optically biaxial. At higher temperatures members of the solid solution series are isometric at successively more calcium-rich compositions and pure K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Ca&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;&amp;nbsp;is isometric above about 200 ± 2°C. The system is not binary, as mixtures richer in K&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;Ca&lt;/span&gt;&lt;sub&gt;2&lt;/sub&gt;&lt;span&gt;(SO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;)&lt;/span&gt;&lt;sub&gt;3&lt;/sub&gt;&lt;span&gt;&amp;nbsp;than 42 wt. per cent decompose with the formation of liquid and CaSO&lt;/span&gt;&lt;sub&gt;4&lt;/sub&gt;&lt;span&gt;.&lt;/span&gt;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1016/0022-1902(64)80232-3</dc:identifier>
  <dc:language>en</dc:language>
  <dc:title>The system K2Mg2(SO4)3 (langbeinite)-K2Ca2(SO4)3 (calcium-langbeinite)</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>