http://qiserver.ugr.es/cod/1540626.cif
http://qiserver.ugr.es/cod/1540627.cif
http://qiserver.ugr.es/cod/1540628.cif
http://qiserver.ugr.es/cod/1540629.cif
http://qiserver.ugr.es/cod/1540630.cif
http://qiserver.ugr.es/cod/1540631.cif
http://qiserver.ugr.es/cod/1540632.cif