[meteorite-list] Laurencite disease?

From: Bill Southern <Nugget-Shooter_at_meteoritecentral.com>
Date: Sat May 28 20:52:13 2005
Message-ID: <005801c563e8$897f48f0$0202a8c0_at_yourkgohy9au97>

Hello Tom and List,

They actually were treated that was after being cut and polished and I guess
it has been about 2 weeks now since treatment. Is there a way to prevent
this without the use of oil on a chondrite?

On the other hand it is a fascinating process to witness and seems to move
along at a steady although slow pace in this one area while in other spots
the process is stopped or moving much slower. I am in Arizona where we have
very little humidity right now and my specimens are in a sealed container,
but this is a chemical process correct? Would eliminating oxygen help?

Bill
----- Original Message -----
From: "Tom Knudson" <peregrineflier_at_npgcable.com>
To: "Bill Southern" <Nugget-Shooter_at_direcway.com>;
<Meteorite-list_at_meteoritecentral.com>
Sent: Saturday, May 28, 2005 5:41 PM
Subject: Re: [meteorite-list] Laurencite disease?


> Quick, get some alcohol, poor it into a glass container, wait, no time for
> that, drink it right from the bottle!!!! : ) Really, I personally would
> rinse them in distilled water then soak them in alcohol and then dry them
> under a heat lamp. I don't know if it will really help, but it is better
> than nothing.
> Thanks, Tom
> peregrineflier <><
>
> ----- Original Message -----
> From: "Bill Southern" <Nugget-Shooter_at_direcway.com>
> To: <Meteorite-list_at_meteoritecentral.com>
> Sent: Saturday, May 28, 2005 5:36 PM
> Subject: [meteorite-list] Laurencite disease?
>
>
>> Hello list,
>>
>> I was studying some slices of Franconia today under the microscope when I
>> noticed movement on the surface of one of the slices (stay with me I'm
>> not
> a
>> nut) I switched to a bit higher magnification and along the edge of some
> of
>> the metal in the specimen were small areas of rust with liquid in minute
>> amounts slowly bubbling up within it. I was actually able to watch what I
>> suspect to be Laurencite disease in slow progress.
>>
>> There are several areas on my specimens that are showing these rusting
>> zones, but none actually are showing the liquid (acid?) moving on the
>> surface. Anyway over the last several hours the affected area has grown
>> by
>> quite a bit. Interesting stuff...
>>
>> I have tried to take a photo, but the quality if lacking, sorry. Any
>> added
>> insight as to what I am witnessing would be very welcome.
>>
>> http://www.nuggetshooter.com/imagesMET/frandamage.jpg
>>
>> Best regards, Bill
>>
>>
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>>
>>
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>
>
Received on Sat 28 May 2005 08:51:19 PM PDT