preferred orientation and GSAS...

HALUSKA@xray.alfred.edu
Mon, 13 Nov 1995 18:48:25 GMT

hello all, I have a little question concerning preferred orientation and GSAS.
GSAS allows you to insert "preferred orientation axes". Well, how does one
know which axes to insert? In one of my samples, I used a high purity lead
oxide. Its pattern matches that of 38-1477 and it is orthorhombic. The only
problem is that the intensities for the 100% and 24% peaks are switched. I am
assuming that the processing method which the company used gave some kind of
preferred orientation to the lead oxide which caused this sort of intensity
mismatch. NOw, how should I account for this using the preferred orientation
option in GSAS? Any suggestions?

thanks.

Mike