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Quartz dissolution. I - Negative crystal experiments and a rate law. II - Theory of rough and smooth surfacesThe range of the measured quartz dissolution rates, as a function of temperature and pOH, extent of saturation, and ionic strength, is extended to cover a wider range of solution chemistries, using the negative crystal methodology of Gratz et al. (1990) to measure the dissolution rate. A simple rate law describing the quartz dissolution kinetics above the point of zero charge of quartz is derived for ionic strengths above 0.003 m. Measurements were performed on some defective crystals, and the mathematics of step motion was developed for quartz dissolution and was compared with rough-face behavior using two different models.
Document ID
19930046874
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gratz, Andrew J.
(NASA Headquarters Washington, DC United States)
Bird, Peter
(California Univ. Los Angeles, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 57
Issue: 5
ISSN: 0016-7037
Subject Category
Inorganic And Physical Chemistry
Accession Number
93A30871
Funding Number(s)
CONTRACT_GRANT: NGT-50228
Distribution Limits
Public
Copyright
Other

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