http://qiserver.ugr.es/cod/1001711.cif
http://qiserver.ugr.es/cod/4001693.cif
http://qiserver.ugr.es/cod/4001694.cif
http://qiserver.ugr.es/cod/4001695.cif
http://qiserver.ugr.es/cod/7222187.cif