[meteorite-list] PV and Iron stability

From: almitt2 at localnet.com <almitt2_at_meteoritecentral.com>
Date: Mon, 15 Feb 2010 23:15:47 -0500
Message-ID: <20100215231547.zuekmhsb3qk0ocgc_at_webmail.localnet.com>

Hi Steve,

Good to see you on the list! Best!

--AL Mitterling

Quoting Steve Witt <stelor96 at yahoo.com>:

> Robert,
>
> Total speculation on my part, but the Met Society states that
> "Etching of centimeter-sized metal areas (of PV) reveals a fine
> Widmanst?tten pattern, bandwidth = 0.02 to 0.81 mm (average 0.32 mm).
> This bandwidth is comparable to Gibeon, which has always been
> considered a stable iron with a nickel content of 7.8 - 12.7% (even
> though it has been on the ground for some time. So my thought was
> with the quick recovery of PV as well as the higher nickel content in
> the metal veins, has resulted in the iron being very stable. Just my
> two cents worth. Maybe the pros can weigh in.
>
> Regards,
> Steve
>
>
>
> --- On Mon, 2/15/10, Robert Woolard <meteoritefinder at yahoo.com> wrote:
>
>> From: Robert Woolard <meteoritefinder at yahoo.com>
>> Subject: [meteorite-list] PV and Iron stability
>> To: meteorite-list at meteoritecentral.com
>> Date: Monday, February 15, 2010, 12:52 PM
>> 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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>
>
>
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Received on Mon 15 Feb 2010 11:15:47 PM PST