http://qiserver.ugr.es/cod/1005039.cif
http://qiserver.ugr.es/cod/2101579.cif
http://qiserver.ugr.es/cod/4001940.cif
http://qiserver.ugr.es/cod/7222662.cif
http://qiserver.ugr.es/cod/7222663.cif
http://qiserver.ugr.es/cod/9007818.cif