[meteorite-list] RE: Nice Dronino?

From: Pekka Savolainen <pekka.savolainen_at_meteoritecentral.com>
Date: Thu Nov 25 23:20:57 2004
Message-ID: <41A6AF80.7040102_at_dlc.fi>

Nope, as far as I know. This mirror-polished fellow was
stored in the air-tight plastig-bag, and some 10 months it
was a real beauty. Then it started to rust very fast, or in
fact not only to rust, perhaps "boiling" is a good word for
the process...;-

The beauty today;

http://www.dlc.fi/~nuuska/dronino.jpg

best,

pekka s

Jonathan Gore wrote:

> Would storing it in a vacuum work?
>
> Pekka Savolainen wrote:
>
>>
>> Well, have tried everything except black magic and woodoo...;-
>> Dronino is a quite old one, accordindg Verdansky from before
>> 12:th century. Main part of the pieces was found from the very
>> wet area, so I suppose, the chlorides are not the only problem...,
>> the meteorite is just too old and have spent too much time in a
>> wet soil.
>>
>> http://www.geokhi.ru/~meteorit/dronino1-e.html
>>
>> As I told in my former e-mail, after all tricks my pieces stayed
>> stable some 8 - 10 months, the pieces without any methods to
>> stabilizie them couple of weeks, not much longer.
>>
>> If some happens to find to way to stabilizate this very interresting
>> meteorite indeed, please, let me know...
>>
>> best,
>>
>> pekka s
>>
>>
>>
>> Stephen McMann wrote:
>>
>>> Dear Pekka and List,
>>>
>>> Has anyone ever tried some of the tried and true iron stabilization
>>> techniques on Dronino, such as a long bath in an alcohol and NaOH rich
>>> solution to remove chlorides? On a related subject, I guess that I
>>> may not
>>> really understand the chemistry behind why some meteorites are
>>> stable, and
>>> some are not. Perhaps I will naively ask, "Is it all about chlorides?"
>>>
>>> Sincerely,
>>>
>>> Stephen McMann
>>>
>>> -----Original Message-----
>>> From: Pekka Savolainen [mailto:pekka.savolainen_at_dlc.fi] Sent:
>>> Thursday, November 25, 2004 5:33 PM
>>> To: Stephen McMann
>>> Cc: meteorite-list_at_meteoritecentral.com
>>> Subject: Re: [meteorite-list] Nice Dronino?
>>>
>>>
>>> They are not stable. The older pieces was slag in a few weeks or
>>> months,
>>> the new "stable" ones in 8 - 10 months. I have just one very thin
>>> piece not
>>> distroyed, just because it has a quite heavy lacquer. Fastest ruster
>>> I have
>>> ever seen ;-
>>>
>>> best,
>>>
>>> pekka
>>>
>>>
>>> ______________________________________________
>>> Meteorite-list mailing list
>>> Meteorite-list_at_meteoritecentral.com
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>>>
>>>
>>>
>>
>
>

-- 
Pekka Savolainen
Jokiharjuntie 4
FIN-71330 Rasala
FINLAND
+ 358 400 818 912
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Received on Thu 25 Nov 2004 11:22:24 PM PST