You must remember that oil/grease diffracts as well. For example, Silicone
vacuum grease exhibits a few well defined broad diffraction peaks. Duco
cement has even more prominent diffraction spectrum.
Why not seal the sample in a (0.3 or 0.5 mm) glass or quartz capillary and
collect data thus? We do this routinely with our air/moisture sensitive
samples.
Apurva
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Apurva Mehta
SSRL/SLAC
PO Box 4349, MS 69
Stanford, CA 94309
(650) 926 4791
(650) 926 4100 - FAX
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