rotational diffusion coefficient
Defined by the equation:
is the fraction of particles whose axes make an angle
with the direction
and have an azimuth between
is the fraction of particles having an azimuth between
whose axis passes from values
in unit time.
The axis whose rotational diffusion
is considered has to be clearly indicated.
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