http://qiserver.ugr.es/cod/1523878.cif
http://qiserver.ugr.es/cod/1523879.cif
http://qiserver.ugr.es/cod/1523880.cif
http://qiserver.ugr.es/cod/1523881.cif
http://qiserver.ugr.es/cod/1523882.cif
http://qiserver.ugr.es/cod/1523883.cif