Differential diffusion coefficient

{
  "id": "MLC-T-CHM-003169",
  "term": "Differential diffusion coefficient",
  "field": "Chemistry",
  "definition": "A measure of the rate at which a substance diffuses through a medium under a concentration gradient, where the coefficient itself depends on the concentration. This coefficient describes the proportionality between the flux of a substance and its concentration gradient. It is often determined experimentally by observing the spreading of a concentration boundary.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "concentration gradient",
    "diffusion",
    "diffusion coefficient"
  ],
  "references": [
    "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 (https://doi.org/10.1351/pac197231040577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/differential-diffusion-coefficient/"
}