Ich gebe dazu noch kommentarlos mal die Meinung meines
Physikerkollegen Sterling Webb von der US-Liste weiter:
"> I think what we all assume, just from looking at
> the remarkable photograph, is that these pyramids
> are the taenite portion of the meteorite and that
> sea water, oxygen, UV light, and all the agents of
> weathering has eaten the kamacite away entirely
> to miraculously reveal it.
>
> Both iron phases, taemite and kamacite, are
> isometric-hexoctahedral crystals, which is a
> fancy geometry term for a unit crystal shaped
> like two four-sided pyramids fitted base-to-base.
> More commonly this is called a "cubic" crystal.
>
> The "pyramids" in Lovina are "step" pyramids. I'm
> guessing that the height of those "steps" corresponds
> to what would be the width of the Widmanstätten
> bands if the original structure were in place and
> we could slice and etch it.
>
> It is a remarkable chance to "look inside" the crystal
> structure of an iron meteorite in three dimensions
> and with "x-ray" vision. What it shows is something
> I don't think any imaging technique could ever
> produce.
>
> I'm not a petrologist, you understand, just an old
> physicist and anything bigger than an atom (like
> crystals) is above my pay grade. These are just
> my guesses.
>
> It certainly is pretty, though.
>
>
> Sterling K. Webb"
