do all crystals contain water of crystallization?

Question

this is about hydrates.

Answer 1

Only if they are hydrates.

Different compounds can combine with a discrete number of water molecules. Copper sulfate for example...one mole of it combines with 5 water molecules to give CuSO4*5H2O; this compound is said to have 5 waters of hydration (or crystallization).

Different lattice structures of the same compound may have different waters of crystallization.

Larger compounds whose crystal lattice is less distinct and regular might have varying waters of hydration.

If a compound is ANHYDROUS, then no, it has no waters of crystallization.

Answer 2

I'm not exactly sure about the phrasing of your question but aparently its common for quartz crystals to contain varying quantities of water, which in my understanding is trapped within the crystaline structure most commonly as water vapour which gives quartz its misty hue, or in other cases as an Enhydro, a actual pocket of water encased within the crystal. In the case of the enhydro formation, sometimes a small amount of air also ends up in the same space occupied by the water and as a result you have these wonderful specimens of quartz with bubbles inside them. I have a few in my own collection and I always find them fascinating. Thats all I know.

Answer 3

becareful,,some crystals contain methamphetamines.