Equation describing the contraction
(
)
taking place in a dielectric medium of relative static
permittivity
(formerly called
dielectric constant) upon introduction of an ion of
charge number
and radius
:
with
the
elementary charge.
Note:
Inasmuch as the derivative of
with respect to pressure,
,
is not known for all media, there are approximations to evaluate this term as a function
of
and of the isothermal compressibility of the medium,
.
Source:
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 327
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.
https://doi.org/10.1351/goldbook.
