http://qiserver.ugr.es/cod/1511077.cif
http://qiserver.ugr.es/cod/1522828.cif
http://qiserver.ugr.es/cod/1530173.cif
http://qiserver.ugr.es/cod/1530965.cif
http://qiserver.ugr.es/cod/1531015.cif