http://qiserver.ugr.es/cod/1508972.cif
http://qiserver.ugr.es/cod/1541392.cif
http://qiserver.ugr.es/cod/1541437.cif
http://qiserver.ugr.es/cod/1541439.cif
http://qiserver.ugr.es/cod/1541767.cif
http://qiserver.ugr.es/cod/1541769.cif
http://qiserver.ugr.es/cod/1541771.cif