http://qiserver.ugr.es/cod/1538839.cif
http://qiserver.ugr.es/cod/1538841.cif
http://qiserver.ugr.es/cod/1538843.cif
http://qiserver.ugr.es/cod/1538845.cif
http://qiserver.ugr.es/cod/1538846.cif