Besides water, what is a substance the expands when frozen?

Roxanne33

Intersting question. Most of the websites state taht water is the only one but here's once excerpt from another site : 'Only one other pure substance, the metal bismuth, has the characteristic of being denser in the liquid than in the solid state.! Source : http://www.parentcompany.com/design_kit/dek1g.htm As for antimony, I'm checking... May 21 02, 6:17 PM

Roxanne33

Bismuth and antimony also expand when they freeze, as do some alloys that contain those metals. This is why bismuth and antimony are used in type-metal, which can be molded with great accuracy: The metal does not shrink as it solidifies, so it does not pull away from the corners and edges of the mold. Source : http://www.textbookleague.org/36heat.htm May 21 02, 6:20 PM