http://qiserver.ugr.es/cod/9012635.cif
http://qiserver.ugr.es/cod/9012636.cif
http://qiserver.ugr.es/cod/9012637.cif
http://qiserver.ugr.es/cod/9012638.cif
http://qiserver.ugr.es/cod/9012639.cif