http://qiserver.ugr.es/cod/9000017.cif
http://qiserver.ugr.es/cod/9000018.cif
http://qiserver.ugr.es/cod/9000019.cif
http://qiserver.ugr.es/cod/9000020.cif
http://qiserver.ugr.es/cod/9000021.cif
http://qiserver.ugr.es/cod/9000022.cif
http://qiserver.ugr.es/cod/9000023.cif
http://qiserver.ugr.es/cod/9000024.cif
http://qiserver.ugr.es/cod/9000025.cif