## Wikipedia - Auto-difusión (es) Wikipedia - Autodifusão (pt) Wikipedia - Özyayınım (tr) self-diffusion coefficient

https://doi.org/10.1351/goldbook.S05582
The @D01719@ $$D_{i}^{*}$$ of species $$i$$ in the absence of a @C01032@ @G02669@. It is related to the @D01719@ $$D_{i}$$ by $D_{i}^{*}=D_{i}\ \frac{\partial (\ln c_{i})}{\partial \ln a_{i}}$ where $$a_{i}$$ is the activity of $$i$$ in the solution, and $$c_{i}$$ is the concentration of $$i$$. If an @I03336@ species ($$i^{*}$$) is used to study @D01716@, the @T06422@ @D01719@, $$D_{i}^{*}$$, is practically identical to the self-@D01719@ provided that the @I03327@ is sufficiently small.
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 617 [Terms] [Paper]