Water-of-crystallization definition

Water in a crystal structure that is chemically combined with the other elements in the crystal. The water of crystallization is necessary for the maintenance of crystalline properties, but it can be removed by heat.
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Water of hydration that is necessary for the maintenance of a particular crystalline structure but capable of being removed by sufficient heat.
noun
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Water that occurs as a constituent of crystalline substances in a definite stoichiometric ratio: it can be removed from them by the application of heat at 100°C (212°F) and its loss usually results in a change in the crystalline structure.
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Water of crystallization is defined as water that comes from a crystal substance after heat is applied.

An example of water of crystallization is the water that drips off of a water crystal hanging from the eaves of the house as it warms up after a freezing rain.

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(chemistry) The water present in the crystals of the salts of certain metals; it is weakly bound by electrostatic forces and may normally be removed by heating.
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