http://qiserver.ugr.es/cod/1548564.cif
http://qiserver.ugr.es/cod/1552959.cif
http://qiserver.ugr.es/cod/1552960.cif
http://qiserver.ugr.es/cod/1552961.cif
http://qiserver.ugr.es/cod/1552962.cif