D10, D50, D90

D10, D50, and D90 are statistical measures used to describe particle size distributions. D10 indicates that 10% of the particles are smaller than this size; D50 means 50% (half) are smaller, representing the median size; and D90 means 90% of particles are smaller than this size. These values help characterize the range and distribution of particle sizes in a sample, useful in industries like mining, pharmaceuticals, and materials science to understand how particles are spread and to ensure quality and consistency.