Atomic Weight of Antimony | Commission on Isotopic Abundances and Atomic Weights

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head> <title>Atomic Weight of Antimony | Commission on Isotopic Abundances and Atomic Weights</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" media="all" href="stylesheet.css"><link rel="shortcut icon" href="favicon.ico" /> <link href="css/theme.blue.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="js/jquery-1.11.1.min.js"></script> <script type="text/javascript" src="js/jquery.tablesorter.js"></script> <script type="text/javascript" src="js/jquery.tablesorter.min.js"></script> <script type="text/javascript" src="js/jquery.tablesorter.widgets.js"></script> <script language="JavaScript" type="text/javascript"> $(function() { $("#mytable").tablesorter({theme:'blue',headers:{3:{sorter:'brace'},4:{sorter:false}},widgets:['zebra'],widthFixed:true}); }); </script> <script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-37565923-4']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); </script> </head> <body> <div id="pagewidth"> <div id="header-top" class="clearfix">  <div id="support-navigation"> <ul></ul> </div>   <div id="logo-top"> <a href="http://www.ciaaw.org"><img src="images/ciaaw.png" alt="Logo of the Atomic Weights Commission"></a> <a href="http://www.iupac.org" target="_blank"><img src="images/iupac.png" class="xx" alt="Logo of the International Union of Pure and Applied Chemistry"></a> </div>   <div id="main-navigation"> <ul> <li><a href="index.htm">Home</a></li> <li><a href="atomic-weights.htm">Atomic Weights</a></li> <li><a href="isotopic-abundances.htm">Isotopic Abundances</a></li> <li><a href="reference-materials.htm">Reference Materials</a></li> <li><a href="commission.htm">The Commission</a></li> <li><a href="info.htm">FAQ's</a></li> </ul> </div>  </div id="header-top">  <div id="breadcrumb"> <ul> <li><a href="index.htm">Other elements</a></li> </ul></div> <div id="content"> <div id="main-content"> <h1>Antimony</h1><p><table id="mytable" class="tablesorter"><thead><tr><th>Isotope</th><th>Atomic mass (Da)</th><th>Isotopic abundance (amount fraction)</th></tr></thead> <tbody> <tr><td><sup>121</sup>Sb </td><td>120.903 81(2)</td><td>0.5721(5)</td></tr> <tr><td><sup>123</sup>Sb </td><td>122.904 21(1)</td><td>0.4279(5)</td></tr> </tbody></table><br> <p> In the early 1960s, the Commission assessed that an average value of <i>A</i><sub>r</sub>(Sb) from chemical determinations was 121.75, whereas mass-spectrometric determinations yielded 121.76. The chemical value was evidently given a preference when in 1969 the Commission recommended <i>A</i><sub>r</sub>(Sb) = 121.75(3). </p><p> In 1989, the Commission adopted <i>A</i><sub>r</sub>(Sb) = 121.757(3) based on new mass-spectrometric measurements. This estimate was further revised to <i>A</i><sub>r</sub>(Sb) = 121.760(1) in 1993, based on more calibrated mass-spectrometric determinations. </p><p> Although no evidence of isotope fractionation of antimony in any of the terrestrial materials has been found, the "g" annotation is due to isotopic anomalies identified in the Oklo uranium deposit at Gabon, south-west Africa. </p> <h9><font color=red>SOURCE</font>  <a href="publications.htm#P3">Atomic weights of the elements: Review 2000</a> by John R de Laeter et al. <i>Pure Appl. Chem.</i> 2003 (75) 683-800<br>© IUPAC 2003</h9> </div>  <div id="support-content"> <img src="images/p-table/Sb.png"><p class="credit">CIAAW</p> <p class="caption"><strong>Antimony</strong><br> <i>A</i><sub>r</sub>(Sb) = 121.760(1) since 1993<br><br> The name derives from the Greek, <i>anti</i> + <i>monos</i> for "not alone" or "not one" because it was found in many compounds. The symbol Sb comes from <i>stibium</i>, which is derived from the Greek <i>stibi</i> for "mark" because it was used for blackening eyebrows and eyelashes. The minerals stibnite (Sb<sub>2</sub>S<sub>3</sub>) and stibine (SbH<sub>3</sub>) are two of more than one hundred mineral species, which were known in the ancient world. </p> </div id="support-content">  </div id="content">  <div id="push"></div></div id="pagewidth">  <div id="footer"> <img src="images/logo.png"><br><br> <a href="privacy.htm">Privacy policy</a>  |  <a href="impressum.htm">Impressum</a>  |  <a href="members.htm">Contact</a>  |  © CIAAW, 2007-2015 <br> </div>  </body></html>

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Atomic Weight of Antimony | Commission on Isotopic Abundances and Atomic Weights