http://qiserver.ugr.es/cod/1538651.cif
http://qiserver.ugr.es/cod/9004166.cif
http://qiserver.ugr.es/cod/9004167.cif
http://qiserver.ugr.es/cod/9004168.cif
http://qiserver.ugr.es/cod/9004169.cif
http://qiserver.ugr.es/cod/9004170.cif