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Other than water, what else expands when frozen?

User Dieend
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Silicon, Gallium, Germanium, antimony, Bismuth, Plutonium, and also chemical compounds that form spacious chemical compounds that form spacious crystal lattices with tetrahedral coordination.
User Timu
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Other things that expand when frozen would be...
Silicon, Gallium, Germanium, antimony.. and a few others.
User Denish
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