http://qiserver.ugr.es/cod/6000585.cif
http://qiserver.ugr.es/cod/7210231.cif
http://qiserver.ugr.es/cod/7228251.cif
http://qiserver.ugr.es/cod/7228252.cif
http://qiserver.ugr.es/cod/7228453.cif
http://qiserver.ugr.es/cod/9012366.cif