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Diffusion of water in rhyolitic glassesThe process of water diffusion in 11 natural rhyolitic glasses was considered using the results of measurements by FTIR spectroscopy of concentration profiles of both H2O and OH at different temperatures. The diffusion coefficients of H2O and OH, D(H2O) and D(OH), respectively, were calculated from concentration profiles. Results indicate that, at 400-530 C, the value of D(OH) is negligible compared to that of D(H2O), and that OH does not contribute significantly to the diffusion of total water even at water concentrations as low as 0.2 percent, which is minute compared to that of OH. In the activation energy vs radius plot, the D(H2O) followed the same trend as that of noble gases.
Document ID
19910043798
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Zhang, Youxue
(California Inst. of Tech. Pasadena, CA, United States)
Stolper, E. M.
(California Inst. of Tech. Pasadena, CA, United States)
Wasserburg, G. J.
(California Institute of Technology Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 55
ISSN: 0016-7037
Subject Category
Geophysics
Accession Number
91A28421
Funding Number(s)
CONTRACT_GRANT: NSF EAR-89-16707
CONTRACT_GRANT: DE-FG03-88ER-13851
CONTRACT_GRANT: NAGW-1472
Distribution Limits
Public
Copyright
Other

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