http://qiserver.ugr.es/cod/1540844.cif
http://qiserver.ugr.es/cod/1540938.cif
http://qiserver.ugr.es/cod/1540939.cif
http://qiserver.ugr.es/cod/1540969.cif
http://qiserver.ugr.es/cod/1540970.cif
http://qiserver.ugr.es/cod/1540971.cif
http://qiserver.ugr.es/cod/1541252.cif