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Condensation of nonequilibrium phases of refractory silicates from the vaporSilicon monoxide solid was evaporated in a bell jar containing reducing, neutral, or oxidizing atmospheres at pressures of a few torr. The vapor invariably condensed as smoke-sized particles of silicon sesquioxide, Si2O3. The condensation of a solid whose composition differs from that of the parent gas and is apparently the least stable of the three solid species illustrates the importance of specific nucleation effects in the condensation process. This result has significant implications for theories of formation of grains in space.
Document ID
19780070004
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Day, K. L.
(Arizona, University Tucson, Ariz., United States)
Donn, B.
(NASA Goddard Space Flight Center Astrochemistry Branch, Greenbelt, Md., United States)
Date Acquired
August 9, 2013
Publication Date
October 20, 1978
Publication Information
Publication: Science
Volume: 202
Subject Category
Inorganic And Physical Chemistry
Accession Number
78A53913
Distribution Limits
Public
Copyright
Other

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