As long as we are on the subject, has anybody done experiments regarding the retentivity of vycor vs. quartz for gases (particularly H2)?  Given the manufacturing characteristics of vycor that have been described, I would expect quartz to be less subject to H2 diffusion than vycor.

cheers,
greg
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Dr. Greg B. Arehart
Department of Geological Sciences, MS-172
University of Nevada, Reno
Reno, NV 89557-0138
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phone: 775-784-6470
fax: 775-784-1833
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