<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Chung Chieh</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">The Archimedean truncated octahedron. II. Crystal structures with geometric units of symmetry 43m</style></title><secondary-title><style face="normal" font="default" size="100%">Acta Cryst. (1980). A36, 819-826</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1980</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://scripts.iucr.org/cgi-bin/paper?S0567739480001635</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">A36</style></volume><pages><style face="normal" font="default" size="100%">819-826</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">All geometric units in crystal structures of space groups&amp;nbsp;&lt;i&gt;P&lt;/i&gt;&lt;img align=&quot;bottom&quot; alt=&quot;{\bar 4}&quot; height=&quot;13&quot; src=&quot;https://journals.iucr.org/a/issues/1980/05/00/a18440//teximages/a18440fi1.gif&quot; width=&quot;7&quot;&gt;3&lt;i&gt;m&lt;/i&gt;,&amp;nbsp;&lt;i&gt;I&lt;/i&gt;&lt;img align=&quot;bottom&quot; alt=&quot;{\bar 4}&quot; height=&quot;13&quot; src=&quot;https://journals.iucr.org/a/issues/1980/05/00/a18440//teximages/a18440fi1.gif&quot; width=&quot;7&quot;&gt;3&lt;i&gt;m&lt;/i&gt;,&amp;nbsp;&lt;i&gt;Pn&lt;/i&gt;3&lt;i&gt;m&lt;/i&gt;,&amp;nbsp;&lt;i&gt;F&lt;/i&gt;&lt;img align=&quot;bottom&quot; alt=&quot;{\bar 4}&quot; height=&quot;13&quot; src=&quot;https://journals.iucr.org/a/issues/1980/05/00/a18440//teximages/a18440fi1.gif&quot; width=&quot;7&quot;&gt;3&lt;i&gt;m&lt;/i&gt;&amp;nbsp;and&amp;nbsp;&lt;i&gt;Fd&lt;/i&gt;3&lt;i&gt;m&lt;/i&gt;&amp;nbsp;possess point group&amp;nbsp;&lt;img align=&quot;bottom&quot; alt=&quot;{\bar 4}&quot; height=&quot;13&quot; src=&quot;https://journals.iucr.org/a/issues/1980/05/00/a18440//teximages/a18440fi1.gif&quot; width=&quot;7&quot;&gt;3&lt;i&gt;m&lt;/i&gt;. These units may be vacant, or may contain one or more atoms. In units containing more atoms than one, the atoms form one or a collection of these polyhedra: tetrahedron, truncated tetrahedron, octahedron, cuboctahedron or truncated octahedron; the last two may be distorted. Therefore, a formula that lists the consecutive polyhedra starting from the center of the unit can be used for the tabulation of these crystal structures. Only structures of Cu&lt;sub&gt;2&lt;/sub&gt;O type are known in&amp;nbsp;&lt;i&gt;Pn&lt;/i&gt;3&lt;i&gt;m&lt;/i&gt;&amp;nbsp;and typical structures of the other four space groups are tabulated.</style></abstract></record></records></xml>