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Obsolete metric unit prefix for 10^-14
Micri- (
unit symbol mc-) is an
archaic non-
SI
decimal
metric prefix for 10−14.
[1]
It was proposed as a prefix for the
CGS-unit of energy, the
erg. The
micrierg was proposed in 1922 by
William Draper Harkins as a unit of energy equating to 10−14 erg,
[1]
[2]
[3]
[4]
[5]
[6] the equivalent to 10−21
joule, as a convenient unit to measure the
surface energy of
molecules
[5] in
surface chemistry.
[7] It saw limited use. One
electronvolt is about 160 micriergs. In 1991, the micrierg was officially designated the
zeptojoule when the zepto- prefix for 10−21 was officially adopted.
See also
References
- ^
a
b Cardarelli, François (2003).
Encyclopaedia of Scientific Units, Weights and Measures.
Springer-Verlag London Ltd.
ISBN
978-1-4471-1122-1.
-
^ Roberts, Lathrop Emerson;
Harkins, William Draper; Clark, George Lindenberg (2013-07-01) [1922].
The Orientation of Molecules in Surfaces, Surface Energy, Adsorption, and Surface Catalysis. V. The Adhesional Work Between Organic Liquids and Water: Vaporization in Steps as Related to Surface Formation. University of Chicago. Retrieved 2015-08-25.
-
^ Holmes, Harry N. (1925).
Colloid Symposium Monograph - Papers Presented at the Second National Symposium on Colloid Chemistry, Northwestern University, June, 1924. Vol. 2. The Chemical Catalog Company, Inc. Retrieved 2015-02-15.
-
^
"Journal of the American Chemical Society - Issues for 1898-1901 include Review of American chemical research, v. 4-7; 1879-1937, the society's Proceedings". Journal of the American Chemical Society. 44.
American Chemical Society: 665. 1922.
ISSN
0002-7863. Retrieved 2015-02-15.
- ^
a
b Jerrard, H. G.; McNeill, D. B. (2012-06-12) [1963].
A Dictionary of Scientific Units - Including dimensionless numbers and scales (5 ed.).
Chapman and Hall Ltd., reprint:
Springer Science & Business Media.
ISBN
978-9400941113. Retrieved 2015-02-15.
-
^
Partington, James Riddick (2010-02-17) [1949].
An Advanced Treatise on Physical Chemistry: Fundamental principles. The properties of gases. Vol. 1. Longmans, Green. Retrieved 2015-08-25.
-
^ Cardarelli, François (1999) [1966].
Scientific unit conversion: A practical guide to metrication (2 ed.).
Springer-Verlag London Limited.
doi:
10.1007/978-1-4471-0805-4.
ISBN
978-1-85233-043-9. Retrieved 2015-08-25.