Changeset 356

Timestamp:

Dec 4, 2009 5:04:45 PM (14 years ago)

Author:

toby

Message:

# on 2000/11/27 21:10:45, toby did:
define XYZU+-F

File:

• trunk/doc/expgui6.html (modified) (1 diff, 3 props)

trunk/doc/expgui6.html

@@ -99 +99 @@
 When the "New Constraint" button is pressed, a blank constraint editing
 window is opened. Note that any variable to the right may then be selected,
-including two special codes, Uxx and XYZU. XYZU creates four constraints, 
+including three special codes, Uxx, XYZU and XYZU+-F. 
+<UL><LI>
+XYZU creates 
+four constraints, 
 requiring the shifts on x, y, z and Uiso to be the same for all the selected 
-atoms. Uxx does the same for the six anisotropic displacement parameters.
-These special codes are valuable for atoms that share a site.
+atoms.
+<LI> 
+Uxx does the same for the six anisotropic displacement parameters.
+<LI>
+<a name="XYZUF"></a>XYZU+-F is used for pairs of atoms where 
+the shifts on x, y, z and Uiso are required to be equal, but the shifts
+on Frac are opposite. 
+</UL>
+These special codes are valuable for atoms that share a site or are 
+otherwise grouped together.
 <P>
 <a name="AtomConstraintsMax"></a>