Brian Toby a écrit :
If the numbers are real values then they are not counts. They may be
counts per second or something else. One needs to have uncertainty
estimates for these intensities before one can do a meaningful
Rietveld refinement (with any code). Following the above procedure, by
mult
[EMAIL PROTECTED] a écrit :
Hello
I am a new user of GSAS, but I have a problem.
I can't to convert my files to the GSAS format. I trying with powder and
convx software, but I don't have good results. I trying with the option
"convert" in GSAS, but nothing, too.
I send you one file (attache to this
your data are free format with intensities as a real variable. Using
excel or any equivalent you can convert in integer intensities (e.g.
multiplying by ten to avoid errors with low values) which is the usual
data input ("counts").
Step 2 is then to convert the free 2th-I (real-integer) file into G
your data are free format with intensities as a real variable. Using
excel or any equivalent you can convert in integer intensities (e.g.
multiplying by ten to avoid errors with low values) which is the usual
data input ("counts").
Step 2 is then to convert the free 2th-I (real-integer) file in
P.S. Attachment is not allowed in this list.
I am using powder to convert files and using well in GSAS. Use Powder and click
open file - chose the option with your extention. Then save the file as *.gsa.
It should work.
Apu
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Apu Sarkar
Research Fel
Dear Matteo,
Thanks for the problem.
I have used pseudo voigt function to fit the peaks and finally used the program
BREADTH and obtained Dv=31 A, Da=18 A.
Please send me your simulation parameters, plots/calculations.
Regards,
Apu
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Apu Sarkar
Res
Good afternoon,
Now I haven't ConvX here, but once I had done so:
you can copy angle and Intensity columns from UXD file on a NotePad
(Block Notes), saving it as a file *.txt.
Then with ConvX you convert this simple ASCII file (select file ASCII,
2theta/Intensity) in a file for GSAS (type file: G
Dear Matteo,
Thanks for the exercise.
>From pseudo-Voight fitting I have got Dv=33A, Da=23A,
which gives the average size =21A and the relative
dispersion c=0.28 (c = [sigma/]^2).
However, I suspect that the actual values you used for the simulation
were ~30A and c~0.25.
Do I win the F1 GP? :-)
Leonid,
> Could you, please, give a reference to a study where Dv and Da sizes
> were derived from the parameters of pseudo-Voight or Voight fitted to
> simulated profiles for various size distribution dispersions?
I did something better (I hope).. at the end of the mesg you find xy
data with a
Dear All,
I`m trying to refine the synchrotron data of BaTiO3 powder. In my case, i
believe that Ti has two valance states, 3+ and 4+. Since
the x rays are scattered from the electrons, Ti 3+ and Ti 4+ should act as
different scatterers. I want to add both Ti 3+ and Ti 4+
to the lattice. I think
Dear GSAS users,
first of all Good Easter to everybody (even if quite late!).
I have a problem with GSAS: I don't understand why, during a refinement
of a TOF neutron profile, I see a big increase of the Bragg index RF^2
(from 12% to 61% !!) if I insert in the refinement just three little
peaks (
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