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Not one molecule, no. The expansion of freezing water is a bulk property of water (many molecules get arranged into a configuration that takes up more space than the liquid) but a single molecule wouldn't do that.
I guess that is that and it boils down to a qty issue. If the quantity of water in the stone will exceed the space inside the stone when changing state to ice, can it generate enough pressure to crack the diamond?? I am doubtful on this though....lets see
OK, imagine I take a diamond and drill a hole into it so that there's a thin shell of diamond left, then I cut a thread on the hole and fit it with a screw top. If I fill it with water, screw the top on and freeze it then , if the walls are thin enough it will break.Now Imagine that I just put a little water in it and freeze it; nothing happens because there's enough space to take up the expansion. If I fill it a bit more then the ice will fill the space and expand a bit but the diamond will stretch slightly.There will come a point where adding one more molecule of water will overcome the elasticity of the diamond and break it.That one molecule could be said to break the diamond.
I generally use laser etching to engrave diamonds, what do you use?
Ahem! Well, nearly all diamonds have defects called "inclusions". Diamondologists call them inclusions so that people don't think they are buying dodgy diamonds with defects. (This is not unlike softwareologists when they refer to defects in software as "errata" 'cos people might not buy the stuff if they thought it was full of stinking bugs.)Anyway, I digress. Some of these defects - er, inclusions - can be cracks that come to the surface of the diamond. Now, if water molecules(quite a lot of course) were to get into the crack and the diamond was cooled so that the water froze, I'm pretty sure the diamond would split. I will now ask Mrs G if she has any spare diamonds laying around that we can use to conduct an experiment.Later:I am not able to post what Mrs G told me, but I'm afraid there will be no experiment today.
the pressure of the water expansion would need to be greater than the tensile strength of a diamond this may work but the numbers will have to be crunched....Ill have a look when Ive more time, but several other factors would have to be examined.1 Biggest problem is the scale, I rather suspect this isn't quite linear Ive a few thoughts about this and will re post once Ive fleshed them out2 I'm under the impression that ice under a lot of pressure actually shrinks I'm pretty sure i read a paper on it once and may have even posted about it3 If the water was perfectly sealed in a flawless diamond (i know spherical cows in a vacuum) this produces 2 more problemsa) I'm pretty sure pure h2o wont freezeb) water is incompressible therefore the hermetic seal of the diamond will not allow expansion and again prevent freezing.Phewww! Damn you Neil you've got me thinking I hate having to crunch the numbers.
Diamond is hard, not tough.
If a molecule of water was travelling fast enough, could it crack, or even destroy, a diamond?
Quote from: LeeE on 30/03/2010 23:45:37Diamond is hard, not tough.Who said Diamonds are tough