 | This article includes a list of general references, but it lacks sufficient corresponding inline citations. (July 2011) |
| Granulometry | |
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| Basic concepts | |
| Particle size, Grain size, Size distribution, Morphology | |
| Methods and techniques | |
| Mesh scale, Optical granulometry, Sieve analysis, Soil gradation | |
Related concepts | |
| Granulation, Granular material, Mineral dust, Pattern recognition, Dynamic light scattering | |
Grain size (or particle size) is the diameter of individual grains of sediment, or the lithified particles in clastic rocks. The term may also be applied to other granular materials. This is different from the crystallite size, which refers to the size of a single crystal inside a particle or grain. A single grain can be composed of several crystals. Granular material can range from very small colloidal particles, through clay, silt, sand, gravel, and cobbles, to boulders.