[meteorite-list] PV and Iron stability

From: wahlperry at aol.com <wahlperry_at_meteoritecentral.com>
Date: Tue, 16 Feb 2010 10:57:19 -0500
Message-ID: <8CC7D37DA9AD69B-1F5C-103DF_at_webmail-d041.sysops.aol.com>

Hi Rob and list,

The Portales Valley meteorite that we recovered was in remarkable
condition. The meteorite only had a small portion buried in the dirt,
the remainder exposed to the elements. There was very little surface
rust. The PV meteorite was cut with well water and allowed to dry. The
cut surface appeared to have rust stains along the interior in numerous
locations. Upon closer inspection they were actually crystal structures
/ apatite. The cut surface has been left untouched since cutting and
still shows no signs of significant weathering.


Sonny


-----Original Message-----
From: Robert Woolard <meteoritefinder at yahoo.com>
To: meteorite-list at meteoritecentral.com
Sent: Mon, Feb 15, 2010 10:52 am
Subject: [meteorite-list] PV and Iron stability


Hello,? Thanks to everyone who responded to my question concerning the
state of their PV specimens. Stability was unanimous, with no one
experiencing any problems with rusting.? :-)? And that brings up a
related question concerning stability that I might should already know
the answer to, but do not: ? Is PV's apparent rust-resistance for at
least the last 10+ years (and hopefully many more) due SIMPLY to the
fact that the specimens were recovered so quickly, and were spared
exposure to, and penetration of, water for hundreds to thousands of
years??And if so, are ALL freshly recovered irons (or "metal veined" as
in the case of PV) just inherently stable?? Or does inherent resistance
to rusting vary from one meteorite to the next based more on the exact,
specific chemical makeup of the iron and any particular find may or may
not be prone to rusting regardless of how quickly it was recovered?????
Thanks in advance for any help with this,? Robert Woolard?
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Received on Tue 16 Feb 2010 10:57:19 AM PST