an><span class="p">(</span><span class="n">a</span> <span class="o">=</span> <span class="n">rmax</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span>
    <span class="n">atoms</span> <span class="o">=</span> <span class="n">am</span><span class="o">.</span><span class="n">Atoms</span><span class="p">(</span><span class="n">atype</span><span class="o">=</span><span class="n">atype</span><span class="p">,</span> <span class="n">pos</span><span class="o">=</span><span class="p">[[