http://qiserver.ugr.es/cod/2310002.cif
http://qiserver.ugr.es/cod/2310003.cif
http://qiserver.ugr.es/cod/2310004.cif
http://qiserver.ugr.es/cod/2310005.cif
http://qiserver.ugr.es/cod/2310006.cif
http://qiserver.ugr.es/cod/2310007.cif
http://qiserver.ugr.es/cod/2310008.cif