[GSAS-II] Preferred orientation - Spherical Harmonics

[Toby, Brian H.]

Ruggero,

  You should see a change after you press Refine to redo the simulation. Note that the plus signs on the plot are computed when the pattern is first simulated (or after a reset to the simulation range with the “Edit Range” button on the histogram tree item) and the green line is the simulation with the latest settings.

  In the attached plot I did the simulation initially with no texture (plus signs) and then added a non-zero SH term. Note that the intensity of some classes of reflections is increased.

Brian

[cid:CBAB7170-F46D-4DFD-A675-CF3484A3317D at aps.anl.gov]

On Feb 10, 2020, at 5:51 AM, Frison, Ruggero via GSAS-II <gsas-ii at aps.anl.gov<mailto:gsas-ii at aps.anl.gov>> wrote:

Hi All,

I am trying to simulate a X-Ray powder pattern with texture effect using the spherical harmonics.
I am using Phases -> Data -> Preferred orientation model = "Spherical Harmonics, Harmonic order = 4, C(4,1) = 1.0.
However I do not see any difference between with/without the use of preferred orientation.

What am I doing wrong?
Is there any example/documentation where I can look at?

Thanks
Ruggero

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