http://qiserver.ugr.es/cod/9000001.cif
http://qiserver.ugr.es/cod/9000002.cif
http://qiserver.ugr.es/cod/9000003.cif
http://qiserver.ugr.es/cod/9000004.cif
http://qiserver.ugr.es/cod/9010011.cif