http://qiserver.ugr.es/cod/7117900.cif
http://qiserver.ugr.es/cod/7117901.cif
http://qiserver.ugr.es/cod/7117904.cif
http://qiserver.ugr.es/cod/7117905.cif
http://qiserver.ugr.es/cod/7117907.cif
http://qiserver.ugr.es/cod/7117909.cif