http://qiserver.ugr.es/cod/1100328.cif
http://qiserver.ugr.es/cod/1100329.cif
http://qiserver.ugr.es/cod/1100330.cif
http://qiserver.ugr.es/cod/1536943.cif
http://qiserver.ugr.es/cod/1536945.cif