http://qiserver.ugr.es/cod/9009525.cif
http://qiserver.ugr.es/cod/9011854.cif
http://qiserver.ugr.es/cod/9011855.cif
http://qiserver.ugr.es/cod/9011856.cif
http://qiserver.ugr.es/cod/9011857.cif