http://qiserver.ugr.es/cod/9009950.cif
http://qiserver.ugr.es/cod/9012631.cif
http://qiserver.ugr.es/cod/9012632.cif
http://qiserver.ugr.es/cod/9012633.cif
http://qiserver.ugr.es/cod/9012634.cif
http://qiserver.ugr.es/cod/9015227.cif