On a Scintag PAD V with very narrow slits (0.05 mm receiving slit), I have
been able to achieve with Cu Kalpha:
U = 0 V = 0 W = 2.877 X = 0 Y = 4.454 asym = 0
On the same instrument, with a more normal configuration, I obtain:
U = 0 V 0 W = 7.432 X = 0 Y = 5.098 asym = 0.749
One of course can do better at a synchrotron. On the X3B1 instrument at
NSLS at Brookhaven, I get:
U = 7.479 V = -0.676 W = 0 X = 0.375 Y = 0 asym = 1.171
At X3B1, the profiles retain good shapes, even to high angles ( > 110 deg).
However, the SRM 660 (LaB6) peaks exhibit splitting at these high angles.
Has anyone else ever seen such an effect with LaB6? Perhaps it's not
cubic??
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James A. Kaduk
Amoco Corporation
P.O. Box 3011, MC F-9
150 W. Warrenville Rd.
Naperville IL 60566
kaduk@amoco.com
708-420-4547 (O), 708-420-5252 (FAX)
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