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roughness factor (rugosity)

of a surface
The ratio:
f r = A r A g
where A r is the real (true, actual) surface (interface) area and A g is the geometric surface (interface) area.
Source:
PAC, 1986, 58, 437 (Interphases in systems of conducting phases (Recommendations 1985)) on page 439
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Cite as:
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. doi:10.1351/goldbook.
Last update: 2014-02-24; version: 2.3.3.
DOI of this term: doi:10.1351/goldbook.R05419.
Original PDF version: http://www.iupac.org/goldbook/R05419.pdf. The PDF version is out of date and is provided for reference purposes only. For some entries, the PDF version may be unavailable.
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