Re: how to find Polarization

2006-05-30 Thread [EMAIL PROTECTED]
Dear All, if I well understood JFC correction is perfect in case of parallel incident beam; so, in case of conventional Bragg-Brentano diffractometer, shouldn't it work well only in case of use of Goebel Mirrors, that get incident beam exactly parallel? And is it true that using Goebel Mirrors and

Re: how to find Polarization

2006-05-30 Thread Larry Finger
[EMAIL PROTECTED] wrote: Dear All, if I well understood JFC correction is perfect in case of parallel incident beam; so, in case of conventional Bragg-Brentano diffractometer, shouldn't it work well only in case of use of Goebel Mirrors, that get incident beam exactly parallel? And is it true tha

Re: how to find Polarization

2006-05-30 Thread Will Bisson
Dear Larry, When you removed the soller slits leading to increased the axial divergence, which profile function is appropriate to model this, especially at low angle where the asymmetry is very stark? Kind regards William On 30 May 2006, at 16:01, Larry Finger wrote: [EMAIL PROTECTED] wrote: Dea

How to prepare intensity and hkl files needed by SHELXTL-97 software?

2006-05-30 Thread Dr. Yi-Ping Tong
Dear all Does anybody could tell me how GSAS can extract intensity and hkl valuesneeded by SHELXTL-97 software for structure determination ? Any suggestions or comments are welcome. Thanks in advance. Best wishes Dr. Y. P. Tong China

Re: how to find Polarization

2006-05-30 Thread Larry Finger
Will Bisson wrote: Dear Larry, When you removed the soller slits leading to increased the axial divergence, which profile function is appropriate to model this, especially at low angle where the asymmetry is very stark? I used GSAS profile type 3, which incorporates the Finger, Cox and Jephco

How to prepare intensity and hkl files needed by SHELXTL-97

2006-05-30 Thread Von Dreele, Robert B.
Use "R" option in REFLIST R.B. Von Dreele IPNS Division Argonne National Laboratory Argonne, IL 60439-4814 -Original Message- From: Dr. Yi-Ping Tong [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 30, 2006 9:55 AM To: Rietveld BBS software? Dear all Does anybody could tell me how GSAS

Re: how to find out POLARISATION Factor

2006-05-30 Thread Larry Finger
AlanCoelho wrote: I would like to conclude that to be critical of a method such as the convolution approach to describing instrument line profiles it would serve authors best to first investigate the approach rather than to be critical of it without substance. Amen! I'm really impressed with

Re: how to find out POLARISATION Factor

2006-05-30 Thread Von Dreele, Robert B.
How about even lower angles? From: Larry Finger [mailto:[EMAIL PROTECTED] Sent: Tue 5/30/2006 4:25 PM To: rietveld_l@ill.fr AlanCoelho wrote: > I would like to conclude that to be critical of a method such as the > convolution approach to describing instrument