<?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>E.E. Foord</dc:contributor>
  <dc:contributor>J. J. Fitzpatrick</dc:contributor>
  <dc:creator>T.S. Ercit</dc:creator>
  <dc:date>2002</dc:date>
  <dc:description>A new occurrence of the rare mineral species ordonezite has been found at the Theodoso Soto tin mine, near Sapioris, Durango, Mexico. The average composition of the samples is (Zn&lt;sub&gt;0.98&lt;/sub&gt;Fe&lt;sub&gt;0.02&lt;/sub&gt;)&lt;sub&gt;&amp;Sigma;1.00&lt;/sub&gt;Sb&lt;sub&gt;2.00&lt;/sub&gt;O&lt;sub&gt;6&lt;/sub&gt;; the core of the crystals is slightly richer in Fe than the rim. The mineral is uniaxial (+), with all n greater than 2.30 (n&lt;sub&gt;calc&lt;/sub&gt; is 2.38 at 589 nm); D&lt;sub&gt;obs&lt;/sub&gt; 6.66 g/cm&lt;sup&gt;3&lt;/sup&gt;, D&lt;sub&gt;calc&lt;/sub&gt; 6.67 g/cm&lt;sup&gt;3&lt;/sup&gt;. It is isostructural with ferrotapiolite, with a 4.668(2), c 9.269(6) A (from powder-diffraction data), space group P4&lt;sub&gt;2&lt;/sub&gt;/mnm, and is twinned on {103}. Its crystal structure, refined to R=4.1, wR=4.3% using 163 observed reflections, is fully cation-ordered.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.2113/gscanmin.40.4.1207</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>Mineralogical Association of Canada</dc:publisher>
  <dc:title>Ordonezite from the Theodoso Soto Mine, Sapioris, Durango, Mexico: New data and structure refinement</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>