In its most general form, the @E01914@ equation relates the atomic @M03955@ \(b_{i}\) of a species \(i\) to the @D01719@ \(D_{i}\): i.e., \(D_{i}=k\ T\ b_{i}\).
Source: PAC, 1999,
71, 1307. (
Definitions of Terms for Diffusion in the Solid State) on page 1314 [
Terms] [
Paper]