EXPGUI
EXPGUI top
A.7 Preferential Orientation Pane
The Preferential Orientation Pane is used to control parameters related
to fitting parameters using the March-Dollase formulation
for preferred orientation. In this model one or more axes are designated
as directions [designated by (hkl)] where crystallites are over
(Ratio > 1) or underrepresented (Ratio < 1).
The checkbox to the right of the Ratio value determines if it will
be refined.
If more than one axis is present, one must define the relative fraction
of preferred orientation for each direction. These fractions are normalized,
so do not vary the fractions for all directions in a phase.
If
"Multiple Histogram Selection" mode is set to any value other than
"Off", all terms are displayed for all selected histograms.
No attempt is made to group terms or flags.
Note that the other model for treating preferred orientation -- the orientation
distribution function (spherical harmonics) is not yet implemented
in EXPGUI and must be accessed from EXPEDT.
EXPGUI top
Brian Toby (Brian.Toby@NIST.GOV)
$Revision: 224 $ $Date: 2009-12-04 23:02:28 +0000 (Fri, 04 Dec 2009) $