Water
In Our Time
00:00
The Effects of Ice on Density
Each water molecule is essentially pinioned in place by these four sort of hydrogen interactions. When you actually get melting, one of the curious things is that this structure effectively collapses and you start to have slightly more neighbors. This is what kind of accounts for this change in density that we observe. But the intriguing thing, of course, is the fact that water actually has these kinds of channels running through it.
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