The Granular matter reference article from the English Wikipedia on 24-Apr-2004
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Granular matter

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A granular matter is a system composed of a great number of macroscopic elements.

Common examples of such matter are

Granular matter is not a phase of matter. It exhibit properties of both solids and liquids, depending on the way you make experiments, when compacted it can act like a solid, when highly shaken it can act like a liquid (it is fluidized).