http://qiserver.ugr.es/cod/1540974.cif
http://qiserver.ugr.es/cod/1540975.cif
http://qiserver.ugr.es/cod/1540976.cif
http://qiserver.ugr.es/cod/1540977.cif
http://qiserver.ugr.es/cod/1540978.cif
http://qiserver.ugr.es/cod/1540979.cif