http://qiserver.ugr.es/cod/1511976.cif
http://qiserver.ugr.es/cod/1526666.cif
http://qiserver.ugr.es/cod/1527910.cif
http://qiserver.ugr.es/cod/1531061.cif
http://qiserver.ugr.es/cod/1532159.cif
http://qiserver.ugr.es/cod/1538954.cif