JJR

Thank you for the correction. I clearly misunderstood the descriptions that I read and didn't realize it was soluble. Will edit my post.

The freezing point of D2O is actually 3.82 degrees C (38.876 degrees F), significantly higher than that of H2O. It is also about 10% denser. EDIT: Unfortunately it's also soluble in normal water, which means no amount of freezing or remelting is going to separate them.