[meteorite-list] R: acid for pallasite

From: Francesco Moser <cojack_at_meteoritecentral.com>
Date: Wed, 21 Sep 2016 15:31:38 +0200
Message-ID: <002801d2140c$7b8a9b10$729fd130$_at_tiscali.it>

Yes John!
It's exactly what I want to do! :)
Thanks!

<x>x<x>x<x>
Francesco


-----Messaggio originale-----
Da: Meteorite-list [mailto:meteorite-list-bounces at meteoritecentral.com] Per conto di John Cabassi via Meteorite-list
Inviato: mercoled? 21 settembre 2016 05:23
A: Gmail <mendy.ouzillou at gmail.com>
Cc: Met-List <meteorite-list at meteoritecentral.com>
Oggetto: Re: [meteorite-list] acid for pallasite

Francesco and All,
I understand where you're coming from. You have a pallasite slice/end cut that apparently was not cut properly. By that I mean, the final prep work so you have some moisture trapped inside the item which has led to rust developing between the iron/nickel and the olivine/peridot. The olivine/peridot has popped out but because it has accumulated rust residue, it won't go back where it came from. I suggest drying it out manually cleaning up the rust on the surface of the olivine/peridot as well as cleaning up the actual socket (I haven't used that one in a long time) that the olivine/peridot has fallen out of.

I would not go to the point of acid. I would put on some glasses with magnification, spend a little time slowly cleaning up both surfaces and proceed with putting the jigsaw back together

Cheers
John

On Tue, Sep 20, 2016 at 5:54 PM, Gmail via Meteorite-list <meteorite-list at meteoritecentral.com> wrote:
> Francesco,
>
> I am obviously in the minority, but I thought you wanted to keep the
> pallasite whole and just wanted to get rid of rust. Re-reading the
> email, it does seem that you may want to dissolve the iron to extract
> the olivines. If you want to extract the olivines, be aware that
> whatever acid you use will need to be very concentrated and VERY dangerous.
>
> The risk/reward and return on investment seems hardly worth it.
>
> Best,
>
> Mendy Ouzillou
>
> On Sep 20, 2016, at 11:49 PM, CRAIG MOODY via Meteorite-list
> <meteorite-list at meteoritecentral.com> wrote:
>
> The very thought of it makes me cringe. The chances of getting
> crystals worthy of gem-stones, is slim. IMHO it would be sacrilege to
> destroy one of the most beautiful meteorite types, for a few gems and a little cash.
>
> On 09/20/16, Gmail via Meteorite-list
> <meteorite-list at meteoritecentral.com>
> wrote:
>
> Depending on the pallasite (is the cost of rehabilitation worth it)
> and the extent of rust damage, you can pursue different options. If
> there is rust between the olivines and iron, you will likely have to
> use an electrolytic process. KD Meteorites are the experts in doing
> this. If it is just a little bit of rust, then relish and then etch with Nital.
>
> Mendy Ouzillou
>
> On Sep 20, 2016, at 10:43 PM, Francesco Moser via Meteorite-list
> <meteorite-list at meteoritecentral.com> wrote:
>
> Hello!
> Wich kind of acid I can use for dissolve the iron/rust in a Pallasite,
> so I can save the Olivine?
>
>
> Thanks a lot!
>
> <x>x<x>x<x>
> Francesco
>
>
>
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Received on Wed 21 Sep 2016 09:31:38 AM PDT