http://qiserver.ugr.es/cod/1568722.cif
http://qiserver.ugr.es/cod/1569459.cif
http://qiserver.ugr.es/cod/1570843.cif
http://qiserver.ugr.es/cod/1571462.cif
http://qiserver.ugr.es/cod/1571463.cif