http://qiserver.ugr.es/cod/9008200.cif
http://qiserver.ugr.es/cod/9008201.cif
http://qiserver.ugr.es/cod/9008202.cif
http://qiserver.ugr.es/cod/9008203.cif
http://qiserver.ugr.es/cod/9011421.cif