http://qiserver.ugr.es/cod/1523015.cif
http://qiserver.ugr.es/cod/1527604.cif
http://qiserver.ugr.es/cod/1538643.cif
http://qiserver.ugr.es/cod/1539211.cif
http://qiserver.ugr.es/cod/1540129.cif