http://qiserver.ugr.es/cod/9017875.cif
http://qiserver.ugr.es/cod/9017876.cif
http://qiserver.ugr.es/cod/9017877.cif
http://qiserver.ugr.es/cod/9017878.cif
http://qiserver.ugr.es/cod/9017879.cif
http://qiserver.ugr.es/cod/9017880.cif