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Dud3ManGuy OP t1_jaad6tv wrote

Reply to comment by Rpanich in This ice cube grew a fin while it was freezing by Dud3ManGuy

Makes sense but why does this not occur every time then? What changed to allow this to happen this time?

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Rpanich t1_jaadtmn wrote

Just looked it up; so it appears that it has to do with how ice molecules crystallise, air temptation, and the rate of cooling: the spikes form at 60 degree angles and it optimally requires about -7 degrees Celsius. If not it can freeze in more of a “sheet like” pattern which rapidly covers the surface.

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Dud3ManGuy OP t1_jaag0vk wrote

Interesting... So in other words, "shit happens sometimes".

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Rpanich t1_jaag7qe wrote

Essentially: cold enough to freeze, but not so cold as to freeze the surface entirely first.

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