Dear Brian, 

Thanks for your reply, that must be the explanation, but I am not quite sure of 
how to filter these sites from those of interest (since I dont know where they 
are)? I could just try all of them but I am sure that's not the ideal method. 

Best regards,

Irvin


-----Original Message-----
From: Brian H. Toby [mailto:[EMAIL PROTECTED]
Sent: Thu 22/11/2007 14:36
To: rietveld_l@ill.fr
Subject: Re: Difference Fourier Map/GSAS
 
Are you sure that you are not looking at parts of the unit cell that  
are symmetry-equivalent to the peaks found in FORSRH? You can also  
use the FORPLOT program to make 2-D plots to confirm that what FOX  
(or equivalently DRAWxtl) shows agrees with the internal GSAS  
representation.

Brian


On Nov 22, 2007, at 8:19 AM, Telepeni Irvin wrote:

> Hi Vincent,
>
> I meant:
>
> (2) that the positions of your Fourier difference peaks are not the  
> ones you
> see by looking a the 3D Fourier difference map (exported from gsas)  
> in Fox ?
>
> I guess I am using the latest version of both since I reinstalled  
> everything just to make I was missing something important.
>
> Even when I put D where GSAS thinks it should be (and where I hope  
> it should be as well), then it turns out that this site or those  
> sites are hardly occupied (and they are those to be supposingly  
> where the scattering is from).
>
> Cheers
>
> Irvin
>
>
>
>
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