Dear Chuisy, The broad bump you are experiencing at low angle may be to do with the slits. One has to be careful with these new XRD machines which have variable slits, to make sure the divergent and the anti-scattering slits are equal and if you choose to keep the slits fixed, which usually results in a broad peak, the footprint is small. However, this will result in poor high angle data.
It does require a deal of playing around with the slits to see what each of the effects are. The main purpose of variable slits is to have consistant data throughout a range of 2Theta, which it will do, however, it does make refinement just that little harder, having to take into account changing slit width over 2Theta. If anyone has any good tips on this matter, I would be very interested to know. Regards William Bisson On Thu, 3 Jun 2004 [EMAIL PROTECTED] wrote: > Dear all, > > We are recently installing a XRD, and there is a huge peak occurred in the > 3-7deg (2T) which is masking the useful signals from the sample. How can we > eliminate the big peak there? > > We use 40kW, 30mA CuKa x-ray, divergent and receving slits are used, > > many thanks, > > stephen Chui > > >
