Re: Crystal size in GSAS

2006-06-29 Thread Sajeev_Moorthiyedath
Bob, Thanks a lot for the info. regards, Sajeev Moorthiyedath Cabot Corporation 5401 Venice Ave NE Albuqerque, NM 87113 direct (505) 563 4426 fax (505) 342-2168 "Von Dreele,

Re: GSAS ESD/STD conversion

2006-06-29 Thread Cora Lind
At 10:26 AM 6/29/2006 +0200, you wrote: Brian H. Toby wrote: I am trying to convert a GSAS ESD file to a GSAS STD file BTW, I would be surprised if FullProf does not have a way to input intensities with uncertainties rather than assuming intensities are counts. Indeed it does! INSTRM=10 is x

Re: GSAS ESD/STD conversion

2006-06-29 Thread N. Dragoe
Jon Wright a écrit : Some years ago I did see the reverse process of an x, y, esd file being mangled by some conversion program on the way to becoming GSAS format, but I forget the culprit. Quite surprisingly I see GSAS2CIF also truncates, but at least only corrupts the data by a fraction of

RE: Crystal size in GSAS

2006-06-29 Thread Von Dreele, Robert B.
Stephanie, The GSAS routine REFLIST has an option to produce a "single phase ascii" file of reflections. One of the columns in that file is FWHM. Alternatively there is a graphic in EXPGUI (widplt) that will plot FWHM and its Gaussian & Lorentzian contributions as a function of 2-theta. Bob Von

Crystal size in GSAS

2006-06-29 Thread Von Dreele, Robert B.
Sajeev, There is a lot of information like this in the GSAS Manual. Bob Von Dreele R.B. Von Dreele IPNS Division Argonne National Laboratory Argonne, IL 60439-4814 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, June 29, 2006 11:31 AM To: rietveld_l

RE: Crystal size in GSAS

2006-06-29 Thread ruggeri
Hello, I am trying also to calculate crystal size from GSAS, and I want to find back the fwhm of all the peaks from their position: how is it possible? Thanks Stéphane Ruggeri, Ph.D. Stagiaire post-doctoral INRS Énergie, Matériaux et Télécommunications 1650, boul. Lionel-Boulet Varennes (Québec)

Crystal size in GSAS

2006-06-29 Thread Sajeev_Moorthiyedath
Hi, I am wondering if GSAS calculates the crystal size? If not how can I calculate the crystal size? I am using a profile type 3 function (psedo voight) and obtaining the GU,GV,GW values as 0,0, 1.27 E+04 for a Pt/C phase respectively. The Chi-square fit is 2.164. Thankyou. regards, Sajeev Mo

Goebel mirror

2006-06-29 Thread Whitfield, Pamela
Hold that thought. On closer examination of the difference plot at high angles you have something that looks like sample displacement, and refining it improves the fit, although the values for zero point and shift become quite large. Mirrors shouldn't give you this kind of error so make sure it

Goebel mirror

2006-06-29 Thread Whitfield, Pamela
I'm not sure exactly what your description of your setup means - do you have a single or twin mirror system? I'm hoping that it's single because your background is way too high for a properly aligned twin mirror system. I'm assuming that you're using GSAS given the data format. Your pattern r

Re: GSAS ESD/STD conversion

2006-06-29 Thread Jon Wright
Brian H. Toby wrote: I am trying to convert a GSAS ESD file to a GSAS STD file BTW, I would be surprised if FullProf does not have a way to input intensities with uncertainties rather than assuming intensities are counts. Indeed it does! INSTRM=10 is x, y, sigma format for fullprof where it