Reduction of Supercooling of Heavy Water with Silver Iodide

Abstract

In the presence of AgI crystals, three types of water, i.e., water, a 50 ％v/v water/heavy water mixture, and heavy water, were cooled to －3.0 ℃ without stirring. Their order in terms of their freezing points was water＜the mixture＜heavy water. In the absence of AgI crystals, none of these three types of water was frozen under identical conditions; therefore, the presence of AgI crystals reduced supercooling. The observed difference between the freezing points of water and heavy water in the presence of AgI crystals was 4.0 ℃.