http://qiserver.ugr.es/cod/4517025.cif
http://qiserver.ugr.es/cod/4517026.cif
http://qiserver.ugr.es/cod/4517027.cif
http://qiserver.ugr.es/cod/4517028.cif
http://qiserver.ugr.es/cod/4517029.cif
http://qiserver.ugr.es/cod/4517030.cif
http://qiserver.ugr.es/cod/4517031.cif