<div dir="ltr"><div>Dear QuantumEspresso user, <br></div><div><br></div><div>I would like to optimize the cell parameters of a molecular crystal by keeping the bravais lattice as ibrav=6 (i.e. dim(1)=a=b dim(3) = c/a and all angles are 90º)</div><div><br></div><div>However I could not find a keyword that preserves the a = b relation.</div><div><br></div><div>Is any option to keep the cell optimization in the same point group ?</div><div><br></div><div>Thanks in advance !</div><div>quim<br></div><div> <br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><span>----------------------------------------------------------------------------------------------------------------------------------------<br>Dr. Joaquim Jornet Somoza<br>Marie Skladowska-Curie IF Fellow - Postdoctoral Researcher <br></span></div><div><span> email: <a href="mailto:j.jornet.somoza@gmail.com" target="_blank">j.jornet.somoza@gmail.com</a> </span> tel: 0034 650 73 48 91</div><div>Theory Department</div><div>The Max Planck Institute for the Structure and Dynamics of Matter (MPSD) <br></div><div><div>Bldg. 99 (CFEL) </div><div>Luruper Chaussee 149 </div><div>22761 Hamburg </div></div><div><br><span></span></div><div><span>Visiting Researcher <br></span></div><div><span></span><span><span>Nano-Bio Spectroscopy group</span><br>
Departamento de Física de Materiales<br></span></div><div><span>
Universidad del País Vasco (UPV/EHU)<br></span></div><div><span>Donostia-San Sebastián, Gipuzkoa, Spain<br></span></div><div><span></span></div></div></div></div></div></div></div></div></div></div>