http://qiserver.ugr.es/cod/1511575.cif
http://qiserver.ugr.es/cod/1522911.cif
http://qiserver.ugr.es/cod/1523174.cif
http://qiserver.ugr.es/cod/1523759.cif
http://qiserver.ugr.es/cod/1525484.cif