Vitrification temperature of water.
The vitrification temperature (T(g)) of water is an elusive quantity because of the great difficulty in supercooling water sufficiently without initiating its crystallization. Water depresses the vitrification temperature of glycerol (184 degrees K) monotonously, and this property has been used for derivation of an estimate of its T(g). The result, 127 degrees +/- 4 degrees K (-146 degrees +/- 4 degrees C), is the temperature below which water presumably exists as a brittle, glassy substance.
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