class="stringliteral">&#39;O&#39;</span>,  <span class="comment"># oxygen atom</span></div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;                                              <span class="stringliteral">&#39;MW2&#39;</span>,  <span class="comment"># manganese dihydrate ion</span></div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;                                              <span class="stringliteral">&#39;MG&#39;</span>,  <span class=