http://qiserver.ugr.es/cod/1511404.cif
http://qiserver.ugr.es/cod/1521711.cif
http://qiserver.ugr.es/cod/1522684.cif
http://qiserver.ugr.es/cod/1537094.cif
http://qiserver.ugr.es/cod/9013940.cif