http://qiserver.ugr.es/cod/1552843.cif
http://qiserver.ugr.es/cod/1552844.cif
http://qiserver.ugr.es/cod/1552845.cif
http://qiserver.ugr.es/cod/1552846.cif
http://qiserver.ugr.es/cod/1552847.cif