http://qiserver.ugr.es/cod/2100428.cif
http://qiserver.ugr.es/cod/2100429.cif
http://qiserver.ugr.es/cod/2100690.cif
http://qiserver.ugr.es/cod/2103856.cif
http://qiserver.ugr.es/cod/2310029.cif
http://qiserver.ugr.es/cod/2310030.cif