http://qiserver.ugr.es/cod/1001719.cif
http://qiserver.ugr.es/cod/1001725.cif
http://qiserver.ugr.es/cod/4001653.cif
http://qiserver.ugr.es/cod/4001654.cif
http://qiserver.ugr.es/cod/6000667.cif