 2 1'</span>);
banb.addatom(<span class="string">'label'</span>,<span class="string">'MFe3'</span>,<span class="string">'r'</span>,[0.24964 0 1/2],<span class="string">'S'</span>,5/2,<span class="string">'color'</span>,<span class="string">'gray'</span>);
banb.gencoupling;
plot(banb,<span class="string">'range'</span>,[-0.5 1.5;-0.5 1.5;0 0.5])
</pre><img vspace="5" hspace="5" src="tutorial15_01.png" style="width:560px;height:420px;" alt=""> <h2 id="2">Chrality</h2><p>We define three chiral properties of th