http://qiserver.ugr.es/cod/1510831.cif
http://qiserver.ugr.es/cod/1511179.cif
http://qiserver.ugr.es/cod/1511559.cif
http://qiserver.ugr.es/cod/1539179.cif
http://qiserver.ugr.es/cod/1539238.cif
http://qiserver.ugr.es/cod/1539240.cif
http://qiserver.ugr.es/cod/1540828.cif