Editing Stokes-Einstein relation

The '''Stokes-Einstein relation''', originally derived by William Sutherland <ref>William Sutherland "A dynamical theory of diffusion for non-electrolytes and the molecular mass of albumin", Philosophical Magazine  '''9''' pp. 781-785 (1905)</ref> but almost simultaneously published by [[Albert Einstein |Einstein]] <ref>[http://dx.doi.org/10.1002/andp.19053220806 A. Einstein "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen", Annalen der Physik '''17''' pp. 549-560 (1905)]</ref>, states that, for a sphere of radius <math>R</math> immersed in a fluid,

:<math> D=\frac{k_B T}{6\pi\eta R}, </math>

where ''D'' is the diffusion constant, <math>k_B</math> is the [[Boltzmann constant]], ''T'' is the [[temperature]] and <math>\eta</math> is the [[viscosity]]. Sometimes,
the name is given to the general relation:

:<math> D=\mu k_B T, </math>

where <math>\mu</math> is the [[mobility]]. This, coupled with Stokes' law for the drag upon a sphere moving though a fluid:

:<math> \mu=\frac{1}{6\pi\eta R} , </math>

produces the first equation.
==References==
<references/>
;Related reading
*[http://dx.doi.org/10.1063/1.449616 Robert Zwanzig and Alan K. Harrison "Modifications of the Stokes–Einstein formula", Journal of Chemical Physics '''83''' pp. 5861-5862 (1985)]
*[http://dx.doi.org/10.1063/1.2738063     M. Cappelezzo, C. A. Capellari, S. H. Pezzin, and L. A. F. Coelho  "Stokes-Einstein relation for pure simple fluids", Journal of Chemical Physics '''126''' 224516 (2007)]
*[http://dx.doi.org/10.1103/PhysRevLett.107.165902 J. Brillo, A. I. Pommrich, and A. Meyer "Relation between Self-Diffusion and Viscosity in Dense Liquids: New Experimental Results from Electrostatic Levitation", Physical Review Letters '''107''' 165902 (2011)]
[[category: Non-equilibrium thermodynamics]]
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	The '''Stokes-Einstein relation''', originally derived by William Sutherland <ref>~~[http://dx.doi.org/10.1080/14786440509463331~~ William Sutherland "A dynamical theory of diffusion for non-electrolytes and the molecular mass of albumin", Philosophical Magazine '''9''' pp. 781-785 (1905)]</ref> but almost simultaneously published by [[Albert Einstein \|Einstein]] <ref>[http://dx.doi.org/10.1002/andp.19053220806 A. Einstein "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen", Annalen der Physik '''17''' pp. 549-560 (1905)]</ref>, states that, for a sphere of radius <math>R</math> immersed in a fluid,		The '''Stokes-Einstein relation''', originally derived by William Sutherland <ref>William Sutherland "A dynamical theory of diffusion for non-electrolytes and the molecular mass of albumin", Philosophical Magazine '''9''' pp. 781-785 (1905)</ref> but almost simultaneously published by [[Albert Einstein \|Einstein]] <ref>[http://dx.doi.org/10.1002/andp.19053220806 A. Einstein "Über die von der molekularkinetischen Theorie der Wärme geforderte Bewegung von in ruhenden Flüssigkeiten suspendierten Teilchen", Annalen der Physik '''17''' pp. 549-560 (1905)]</ref>, states that, for a sphere of radius <math>R</math> immersed in a fluid,

	:<math> D=\frac{k_B T}{6\pi\eta R}, </math>		:<math> D=\frac{k_B T}{6\pi\eta R}, </math>