http://qiserver.ugr.es/cod/1509857.cif
http://qiserver.ugr.es/cod/1521694.cif
http://qiserver.ugr.es/cod/1524795.cif
http://qiserver.ugr.es/cod/1538619.cif
http://qiserver.ugr.es/cod/1539521.cif