                            <span class="stringliteral">&#39;ZNO&#39;</span>,  <span class="comment"># zinc ion, 2 waters coordinated</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;                                              <span class="stringliteral">&#39;NAO&#39;</span>,  <span class="comment"># sodium ion, 1 water coordinated</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;                                             