http://qiserver.ugr.es/cod/1542402.cif
http://qiserver.ugr.es/cod/9017758.cif
http://qiserver.ugr.es/cod/9017759.cif
http://qiserver.ugr.es/cod/9017760.cif
http://qiserver.ugr.es/cod/9017761.cif