http://qiserver.ugr.es/cod/1527933.cif
http://qiserver.ugr.es/cod/1541700.cif
http://qiserver.ugr.es/cod/1542132.cif
http://qiserver.ugr.es/cod/1542180.cif
http://qiserver.ugr.es/cod/1542200.cif