Re: [meteorite-list] acid for pallasite

[John Cabassi via Meteorite-list]

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
 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
>  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 
> 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
>  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!
>
> xx
> Francesco
>
>
>
> ---
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Re: [meteorite-list] acid for pallasite

[Gmail via Meteorite-list]

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 
 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  
> 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 
>  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!
> 
> xx
> Francesco
> 
> 
> 
> ---
> Questa e-mail è stata controllata per individuare virus con Avast antivirus.
> https://www.avast.com/antivirus
> 
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Re: [meteorite-list] acid for pallasite

[CRAIG MOODY via Meteorite-list]

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   
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 
>  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!
> 
> xx
> Francesco
> 
> 
> 
> ---
> Questa e-mail è stata controllata per individuare virus con Avast antivirus.
> https://www.avast.com/antivirus
> 
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>
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Re: [meteorite-list] acid for pallasite

[Michael Farmer via Meteorite-list]

Contact Steve Arnold. He melted a couple tons of Admire into kitty litter. He 
can tell you. 
I recommend phosphuric acid. 

Sent from my iPad

> On Sep 20, 2016, at 8:29 AM, Gmail via Meteorite-list 
>  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 
>  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!
> 
> xx
> Francesco
> 
> 
> 
> ---
> Questa e-mail è stata controllata per individuare virus con Avast antivirus.
> https://www.avast.com/antivirus
> 
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Re: [meteorite-list] acid for pallasite

[MexicoDoug via Meteorite-list]

Resending see my opinion below interpreting your question to deal with 
extracting the olivines by consuming the metal matrix.

Sent from AOL Mobile Mail


-Original Message---


I have never wanted to consume an iron meteorite, but if I did, I would buy 
some inexpensive 37% (concentrated) muriatic acid for $5 a gallon or whatever 
it is costing now. 

Then buy both goggles an a face shield neoprene gloves and dilute the acid with 
water to as close to 20% as possible.  Put on the protection and cover all my 
skin with clothing.  Then I would simmer (hold just below boiling) a pot of 
water and put a second pot inside with the meteorite in 20% acid with a clear 
cover and keep the simmer until satisfied with the dissolution.
The 20% would be critical to me due to the properties of the acid, not more.  
Less would be slower so it depends on the job that needs to be done.

Muriatic acud is a common name for hydrochloric acid industrial low grade can 
be bought in places in the US for example to add to pools to lower pH or for 
cleaning some toilets and plumbing etc.

Never done this but it is what I'd do since HCl is probably the safest strong 
mineral acid that's cheap.  Other strong acids and more dilute or lower temps 
might be sufficient, so you can work up to your need if time is not an issue.

Be careful and famaliarize yourself withe the risks if you haven't already.
Best wishes
Doug
Sent from AOL Mobile Mail
-Original Message-
From: Francesco Moser via Meteorite-list <meteorite-list@meteoritecentral.com>
To: Meteorite-list <Meteorite-list@meteoritecentral.com>
Sent: Tue, Sep 20, 2016 09:43 AM
Subject: [meteorite-list] acid for pallasite
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!
xx
Francesco
---
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Re: [meteorite-list] acid for pallasite

[Gmail via Meteorite-list]

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 
 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!

xx
Francesco



---
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[meteorite-list] acid for pallasite

[Francesco Moser via Meteorite-list]

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!

xx
Francesco



---
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