http://qiserver.ugr.es/cod/9012874.cif
http://qiserver.ugr.es/cod/9012875.cif
http://qiserver.ugr.es/cod/9012876.cif
http://qiserver.ugr.es/cod/9012877.cif
http://qiserver.ugr.es/cod/9012878.cif
http://qiserver.ugr.es/cod/9012879.cif
http://qiserver.ugr.es/cod/9012880.cif