[meteorite-list] Schreibersite - Inclusions or Plates?

From: Martin Altmann <Altmann_at_meteoritecentral.com>
Date: Tue Feb 8 06:50:43 2005
Message-ID: <001c01c50dd4$f3de7f00$2d539a54_at_9y6y40j>

Ooops, I forgot to mention, that the schreibersite in Sikhote-Alin or in the
IIGs irons forms immense, cm-large, angular crystals, mostly skeletonize.
Take one of the many overcleaned or tumbled Sikhotes from ebay, if you see
there someting more silvery looking out from the surface, cut it and you'll
find a large schreibersite!

Another form as you read, is schreibersite distributed in microscopically
structures. In planes or as so called rhabdites. Rhabdites are schreibersite
in tiny, tiny crystals (because the crystals have often perfect shapes, the
19th cent. researchers thought first, that it must be a new mineral, which
they called rhabdite). If you turn a prepared surface in the light, they
make the effect of tiny sparkling light spots.


----- Original Message -----
From: "Jeff Kuyken" <jeff_at_meteoritesaustralia.com>
To: "Meteorite List" <meteorite-list_at_meteoritecentral.com>
Sent: Tuesday, February 08, 2005 8:19 AM
Subject: [meteorite-list] Schreibersite - Inclusions or Plates?


> G'day List,
>
> My very basic knowledge of iron meteorite minerals tells me that
> schreibersite exists as plates between other minerals in the matrix. (E.g.
> Taenite & Kamacite). Have any meteorites been found where this mineral
> exists as relatively large irregular inclusions? (Think like the shape of
> iron sulphides in Dronino or Mundrabilla.)
>
> Thanks,
>
> Jeff Kuyken
> I.M.C.A. #3085
> www.meteorites.com.au
>
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Received on Tue 08 Feb 2005 06:54:31 AM PST