source: trunk/doc/expgui7.html @ 224

Last change on this file since 224 was 224, checked in by toby, 11 years ago

# on 2000/07/03 21:41:08, toby did:
Preferential Orientation Pane

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  • Property rcs:date set to 2000/07/03 21:41:08
  • Property rcs:rev set to 1.1
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  • Property svn:keywords set to Author Date Revision Id
File size: 2.1 KB
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1<html>
2<head>
3   <META NAME="Author" CONTENT="Brian H. Toby">
4   <title>EXPGUI</title>
5</head>
6<BODY BGCOLOR="#FFFFFF">
7
8<A HREF=http://www.ncnr.nist.gov>
9<IMG SRC="http://www.ncnr.nist.gov/images/ncnrtrans.gif" 
10alt="Link to NIST Center for Neutron Research home page"
11ALIGN=RIGHT></A>
12<A HREF=http://www.nist.gov>
13<IMG SRC="http://www.ncnr.nist.gov/images/webidblue_2lineright.gif" 
14alt="Link to National Institute of Standards & Technology home page"
15ALIGN=LEFT></A>
16<CENTER>
17<A Href="http://www.ncnr.nist.gov/programs/crystallography/software/tclpkgs.html">
18<IMG SRC="tcltklogo100.gif" 
19alt="Link to Tcl/Tk information">
20</CENTER></A>
21<hr>
22
23<center><h1>
24EXPGUI
25</h1></center>
26<A Href="expgui.html">EXPGUI top</A>
27
28<h3>A.7 Preferential Orientation Pane</h3></a>
29<DL><DL>
30The Preferential Orientation Pane is used to control parameters related
31to fitting parameters using the March-Dollase formulation
32for preferred orientation. In this model one or more axes are designated
33as directions [designated by (<i>hkl</i>)] where crystallites are over
34(Ratio > 1) or underrepresented (Ratio < 1).
35The checkbox to the right of the Ratio value determines if it will 
36be refined.
37</DL></DL>
38<img SRC="po1.gif" align=TEXTTOP>
39<DL><DL>
40If more than one axis is present, one must define the relative fraction
41of preferred orientation for each direction. These fractions are normalized,
42so do not vary the fractions for all directions in a phase.
43</DL></DL>
44<img SRC="po2.gif" align=TEXTTOP>
45<DL><DL>
46If
47<A href="expgui.html#multiplehistogram">
48"Multiple Histogram Selection" mode</A> is set to any value other than
49"Off", all terms are displayed for all selected histograms.
50No attempt is made to group terms or flags.
51<P>
52Note that the other model for treating preferred orientation -- the orientation
53distribution function (spherical harmonics) is not yet implemented
54in EXPGUI and must be accessed from EXPEDT.
55</DL></DL>
56
57<hr>
58<A Href="expgui.html">EXPGUI top</A>
59
60<p><a href="http://www.ncnr.nist.gov/staff/toby/">Brian Toby</a> (<a href="mailto:brian.toby@nist.gov">Brian.Toby@NIST.GOV</a>)
61<br>
62$Revision: 224 $ $Date: 2009-12-04 23:02:28 +0000 (Fri, 04 Dec 2009) $
63</body>
64</html>
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