http://qiserver.ugr.es/cod/9012662.cif
http://qiserver.ugr.es/cod/9012663.cif
http://qiserver.ugr.es/cod/9012664.cif
http://qiserver.ugr.es/cod/9014579.cif
http://qiserver.ugr.es/cod/9015417.cif