Almost all materials shink when freezing. Water and gallium are the only excepts I know. Both have abnormal melting/freezing pts as well.
Howard Wu
Kevin Fly Hill <[EMAIL PROTECTED]> wrote:
Kevin Fly Hill <[EMAIL PROTECTED]> wrote:
Question: When water turns to ice the change to a crystal structure
expands the volume (decreases density). Does this density/expansion change
also occur with the development of taenite/kamacite
lattices? ie. at the same temperature is the density of an iron meteorite
match the density of a "terrestrial" matching mixture that is
"noncrystalline"? Guess you could melt down one of your irons and compare?
Fly Hill
> ----- Original Message -----
> From: "mark ford" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Tuesday, December 09, 2003 8:41 AM
> Subject: RE: [meteorite-list] Is there room for a meteorite question ?
>
>
> >
> >
> >
> >
> >
> > On the same note, thermal expansion...
> >
> > Presumably as the core solidifies (cools down) it would contract, would
> > it not?, what effect would that have on the crystalline structure
> > (widmanstatten) would there be a gradual stress/distortion in the
> > taenite/kamacite boundries ?
> >
> >
> > I guess as the core is such a big mass, any significant thermal
> > contraction distortion would hardly be noticeable in a small hand
> > specimen but I would imagine the thermal contraction in something the
> > size of a large planetary body would be massive.
> >
> >
> >
> > Mark Ford
> >
> >
> >
> >
>
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