http://qiserver.ugr.es/cod/1008036.cif
http://qiserver.ugr.es/cod/2300520.cif
http://qiserver.ugr.es/cod/9011997.cif
http://qiserver.ugr.es/cod/9011998.cif
http://qiserver.ugr.es/cod/9011999.cif