MLA Citation: Bloomfield, Louis A. "Question 1294"
How Everything Works 13 Dec 2017. 13 Dec 2017 <http://howeverythingworks.org/print1.php?QNum=1294>.
1294. Will ice cubes made out of heavy water (water that is rich in the heavy isotopes of hydrogen) sink to the bottom of a glass of water? — RN, Denmark
Yes. Heavy water ice is about 1% more dense than liquid water at its melting temperature of 3.82° C. I wouldn't recommend drinking large amounts of heavy water, but you could make sinking ice cubes out of it.

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