Abstract
When particle size distribution parameters are calculated from sieve analysis, it is generally assumed that the distribution within the particle cut is either linear, producing a mean particle size equal to the average of the mesh openings Citation, or that a more proper number is the geometric mean of these two apertures. It is shown here that particles within a mesh cut are not linearly distributed, but rather may be normally, log-normally, or biphasic combinations of the two. Three compounds were examined in this fashion, and results are reported here.