[meteorite-list] Vivianite in a meteorite?

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Fri Sep 30 12:58:02 2005
Message-ID: <DIIE.0000003A00003CE4_at_paulinet.de>

Hello Norm, Pete, and List,

Norm kindly wrote:

"I don't know if it's been reported in meteorites, but if this was earth
 material, my first guess would be vivianite, a hydrous iron phosphate.
 It can look exactly like that (and is often photosensitive: with exposure
 to sunlight it will darken and often turn dark green). Maybe someone on
 the list knows or can check their references regarding vivianite in
 meteorites."

I checked my references and found this:

BUCHWALD V.F. (1990) A new mineral, aruptite, Ni3(PO4)2*8H2O,
the nickel analogue of vivianite (N.Jb.Mineral. Mh.2, pp.76-80).

Vivianite = Fe3(PO4)2*8H2O

.. so maybe it is aruptite, the nickel analogue of vivianite ???

and also:

BUCHWALD V.F. (1975) Handbook of Iron Meteorites,
Volume 2, p. 425, Figure 532 (Cape York):

The small mass was entirely covered by vivianite, probably due to
reaction between the meteorite and weathered bones of the midden.

and furthermore:

BUCHWALD V.F. (1975) Handbook of Iron
Meteorites, Volume 2, p. 793 (Magura Iron):

Haidinger (1844) observed small vivianite crystals in the corroded crust.
The observation has never been elaborated upon, and vivianite has not
been observed in other meteorites except on some Cape York specimens
recovered from Eskimo "k?kkenm?ddings".

Cheers,

Bernd
Received on Fri 30 Sep 2005 12:58:00 PM PDT