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Slurpee machines are a good example of a frozen mass of ice crystals that are 'lubricated' by the sugars and other additions. The Slurpee solution is constantly agitated and the liquid beings to form ice nuclei, because of the constant agitation there is little condensed crystal growth. There are just a lot of little crystals, the sugar never really 'freezes' it tends to hang around and help to keep the crystal size small.
I'd be interested in seeing how 'cold' Slurpee can get with constant agitation... Most likely VERY cold.
-SF
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