class="section level2">
    <h2 id="ref-examples">Examples<a class="anchor" aria-label="anchor" href="#ref-examples"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span class="r-in"><span><span class="fu">a18_c_H2O</span><span class="op">(</span>temp <span class="op">=</span> <span class="fl">25</span>, min <span class="op">=</span> <span class="st">"calcite"</span>, eq <span class="op">=</span> <span class="st">"Coplen07"</span><span class="op">)</span></span></span>
<span class="r-