[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 >> ? >> >> >> >> >> >> >> >> >> ? ? ? >> ______________________________________________ >> Visit the Archives at >> http://www.meteoritecentral.com/mailing-list-archives.html >> Meteorite-list mailing list >> Meteorite-list at meteoritecentral.com >> http://six.pairlist.net/mailman/listinfo/meteorite-list >> > > > > > ______________________________________________ > Visit the Archives at > http://www.meteoritecentral.com/mailing-list-archives.html > Meteorite-list mailing list > Meteorite-list at meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > Received on Mon 15 Feb 2010 11:15:47 PM PST |
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