[sdpd] about the R value of GSAS,thanks.

[?ie Peng <pengjie1228...@yahoo.com>]

i am a newer of GSAS, now i used neutron powder diffraction data to refine structure, but i got the Rp=6.70%, Rwp=9.41%, χ²=1.10, i submitted my paper, but the reviewer said the that i have large R,i wonder if you would like to tell me the meaning of R value, and the reasons may raise the large R, and the same condition of χ²,and their relationship with the data collecting. i looked through the manual, but i did not find the results i want, so i hope you help me.thank you very much. 

Best. 


Jie Peng
College of Chemistry and Chemical Engineering
Graduate University of the Chinese Academy of Sciences
19(A) YuQuan Road
Beijing,100049
China
 		
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