The length characterizing the decrease with distance of the potential in the double
layer = characteristic
Debye length in the corresponding electrolyte
solution
=

:
|
(rationalized four-quantity system)
|
|
(three-quantity electrostatic system)
|
where

= static
permittivity
=

,

= relative static
permittivity of solution;

=
permittivity of vacuum,

=
gas constant,

=
thermodynamic temperature,

=
Faraday constant,

= concentration of species

,

= ionic charge on species

.
Source:
PAC, 1972, 31, 577
(Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix
II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry)
on page 619
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.