If you want to understand crystals thermodynamically, in terms of entropy, you should be using a more rigorous notion of entropy. When crystal formation is ther

If you want to understand crystals thermodynamically, in terms of entropy, you should be using a more rigorous notion of entropy. When crystal formation is thermodynamically favorable, the process causes entropy to increase, not decrease. So if you have a crystal which exists in-situ, in the conditions which caused it to form, you don’t increase entropy by un-creating it.