gnesium ion, 3 waters coordinated</span></div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;                                              <span class="stringliteral">&#39;NGN&#39;</span>,  <span class="comment"># nitrogen</span></div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;                                              <span class="stringliteral">&#39;ACT&#39;</span>,  <span class="comment"># acetate ion</span></div><div class="line"><a na