Question

what is water of crystallisation?

Answer 1

water of crystallization, noun, , water molecules forming essential part of crystal structure of some compounds

Answer 2

In chemistry, water of crystallization or water of hydration or crystallization water is water molecules that are present inside crystals. ... Classically, "water of crystallization" refers to water that is found in the crystalline framework of a metal complex or a salt, which is not directly bonded to the metal cation.