http://qiserver.ugr.es/cod/7221512.cif
http://qiserver.ugr.es/cod/7221513.cif
http://qiserver.ugr.es/cod/7221523.cif
http://qiserver.ugr.es/cod/7221524.cif
http://qiserver.ugr.es/cod/7221525.cif