Diffusion under the influence of a
gradient in chemical composition.
In concentrated solid solutions, e.g.
A1-xBx, or in
diffusion couples,
the motion of one
constituent causes a counterflow of the other
constituents(s) or vacancies. In this case one can define a
diffusion
coefficient for the intermixing, which is called the chemical
diffusion
coefficient or interdiffusion
coefficient.
Source:
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.
