[meteorite-list] NWA 753

From: John Divelbiss <j.divelbiss_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:26 2004
Message-ID: <000901c2d2fe$ff8493c0$cd015a0c_at_0m824>

Mark,

Your ideas sound reasonable. I have yet to consider this level of
protection. Pieces like 753 go in membrane boxes for me...which are somewhat
protective. However, the relative lifespan for all things in this earthly
environment is a matter of decay. Some meteorites will go faster than
others. Hopefully it takes more than a few generations. Remember, a lot of
these things (finds) have been around for awhile already. Just keep them
away from moisture....and from Nantans and Brahins and Campos and Ghubaras
and shales, etc.

John
----- Original Message -----
From: "mark ferguson" <refam_at_yahoo.com>
To: "John Divelbiss" <j.divelbiss_at_worldnet.att.net>
Cc: <meteorite-list_at_meteoritecentral.com>
Sent: Tuesday, February 11, 2003 11:06 PM
Subject: Re: [meteorite-list] NWA 753


> Hi John, Tom and list
> John, would a inert invironment help sabilize this
> oxidation? Like vacuum sealing them in a food storage
> bag like whats advertised on the tv? Or, for a more
> pleasing display, one of the little globes used for
> opal with the large rubber stopper back filled with
> helium (helium is easy to get from local stores which
> they fill ballons with is why I mention it). I'm
> always wondering about long term storage because, as
> you know, once something starts oxidizing, it often
> does so very quickly.
> Mark
>
> --- John Divelbiss <j.divelbiss_at_worldnet.att.net>
> wrote:
> > Tom,
> >
> > First off, many of R pieces from the desert are
> > oxidized a bit.
> >
> > According to "Rocks from Space", these meteorites
> > have very little free
> > metal "floating around" in the makeup. Like normal
> > chondrites with nickel
> > iron. The metal is in the sulfide forms of
> > pyrrhotite and pentlandite. The
> > iron level in the olivine is the highest among
> > chondrites.
> >
> > All that gives this type of meteorite a higher
> > rate/chance of oxidation than
> > others.
> >
> > Hope this helps,
> >
> > John
> > ----- Original Message -----
> > From: "Tom aka James Knudson"
> > <knudson911_at_frontiernet.net>
> > To: "meteorite-list"
> > <meteorite-list_at_meteoritecentral.com>
> > Sent: Tuesday, February 11, 2003 6:58 PM
> > Subject: [meteorite-list] NWA 753
> >
> >
> > > Hello List, I have a slice of NWA 753. It has some
> > rust colored spots
> > > through out the matrix. What Am I looking at? If
> > it is rust, what rusted?
> > > Thanks, Tom
> > > The proudest member of the IMCA 6168
> > >
> > >
> > >
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Received on Wed 12 Feb 2003 08:26:53 PM PST